{"header":{"message":"Refactoring: Move Board stuff to its own file","description":null,"timestamp":"2023-01-07T19:44:42.677257997Z","authors":[{}]},"hash":"TB4YBE4CMWCLSKJ43QF6IU5HVYUUO33BLXVG7XDRLJS3IFIBQLYAC","authors":[{"login":"voroskoi","key":"Guf8VYJNUiWAqxwLxDSKxmvvtY65ht2zK2q4h6VhxrcZ"}],"deps":{"hashes":[["TB4YBE4CMWCLSKJ43QF6IU5HVYUUO33BLXVG7XDRLJS3IFIBQLYAC","Refactoring: Move Board stuff to its own file"],["AA",null],["AILDUV72D7FNB56O2UESPLFWQSHBYO4QZENSK2QSHR3UR52GLVFQC","Implement backup() and restore()"],["SNMQLFZFCV5XTPRLSD7SV4RPVOGUVJOYCZAKI5ATCEPSI5JMGVAAC","Add runtime blocker checks"],["ET37VV7TCQDN6RWF46EUJB6EPNSDOX5TI25NW4P4H5HI4VOTARZQC","Add Rook attack table"],["XCZABYMDLHLHXNTHZFCXPNP6VOCNYUROAQACE5SWBL5FJK2EB7WQC","Initial generateMoves()"],["GZPVUGLJGD3VGLIK7JDABQ24E5SWN5CYRDGI6PIAFZ2BIMRDMANQC","Refactoring: Move blocker attacks to attacks.zig"],["JPK7SJDQWLCNDXJQEQQHXBN4Y677BPQ5QBL55GRZ55RSP4GK4L4AC","Collect moves for each state"],["QYOCQUIWNSZNLCPDJCKERKC6BXBUNTE6AJCFYL4WDRU32LFX37XQC","Implement FEN parser"],["7SQSGQOZRCHN3GGWPNFI36K2R7YZMOPXZP3FP4PYDDOZML5YIYOQC","use pawnMove() as a separate function, bugfixes"],["7T5U3ARTEEAORKCSJY763X5TJRGHCEQK3OW323YO5CZIM77EH77AC","Add Game struct with initial bitboards setup"],["YVNKHIU4ENET52Y5BD5WFA23EVTQ4ZQQLIAZRRA4AN44TXUTNRCQC","Enhance magic number part, add tests"],["YCH5WGGP3PPG2PUNVJIJ6SQXDPYU7NGCVQEJYN27B6FYV5JYQOMQC","Change BitBoard representation"],["XARNBDT4A5X6F3WFC5YNZBV5RNZ5GBRYOWKAK5R6HSTPBNIXTHDAC","Add relevant occupancy matrices"],["3MEBL2ZUY2LI5LW6MK6B32F62TSVF46QVNIDB3Y4OWLAN4NT7KTAC","Add side, enpassant and castling info to Game"],["IBUD4SUGA4IS6HUQIHVJJOFS4CMTWJMTMXS4LWGFVK4PFUFKE5LAC","Add queen attacks"],["FR6N5DIUYYWT5BBOIBOX3GCSEKZIINSGT4F4CWM6YA2XLQEOU4ZQC","Add setOccupancy()"],["TDHJSFFSJZBEZFMDHPLRSVB6CIVJ7AWGGNIC3WUCADQLQSIQKXDAC","Add magic number generator"],["BL3ZR4OWJM54HFXUNMUZKB5YQYVBT7ETFIXCOXWL6S5SZFM6IFDQC","Refactoring, simplifying attack table generation"],["EHBLDMND5ASGZTTLDLEA5RGQIAZTXZN4HBPGD5PB6FDGZGTJ33SQC","Implement castlingMoves() and genMoves() for other pieces"],["WTTQGET65BQV7NSFOI75JGCTWFS6R73OFZE4V63JYWAODNIOUAHQC","Generate rook and bishop attacks based on occupancy"],["O6734I3LMVTKXE5Y7FR3EDGSVIJQHFATUPJJCMRYXD7KLAN6E4UQC","Add isSquareAttacked method to Game"],["A46B5KNQFPTZEIL2JZKD2CQELGU3COE6FGTV2ABS5U7DVTVDGEBQC","Add BitBoard, Square enum and helper methods"]],"deps":["AILDUV72D7FNB56O2UESPLFWQSHBYO4QZENSK2QSHR3UR52GLVFQC"],"known":["BL3ZR4OWJM54HFXUNMUZKB5YQYVBT7ETFIXCOXWL6S5SZFM6IFDQC","ET37VV7TCQDN6RWF46EUJB6EPNSDOX5TI25NW4P4H5HI4VOTARZQC","SNMQLFZFCV5XTPRLSD7SV4RPVOGUVJOYCZAKI5ATCEPSI5JMGVAAC","FR6N5DIUYYWT5BBOIBOX3GCSEKZIINSGT4F4CWM6YA2XLQEOU4ZQC","XARNBDT4A5X6F3WFC5YNZBV5RNZ5GBRYOWKAK5R6HSTPBNIXTHDAC","TDHJSFFSJZBEZFMDHPLRSVB6CIVJ7AWGGNIC3WUCADQLQSIQKXDAC","YVNKHIU4ENET52Y5BD5WFA23EVTQ4ZQQLIAZRRA4AN44TXUTNRCQC","GZPVUGLJGD3VGLIK7JDABQ24E5SWN5CYRDGI6PIAFZ2BIMRDMANQC","WTTQGET65BQV7NSFOI75JGCTWFS6R73OFZE4V63JYWAODNIOUAHQC","7T5U3ARTEEAORKCSJY763X5TJRGHCEQK3OW323YO5CZIM77EH77AC","3MEBL2ZUY2LI5LW6MK6B32F62TSVF46QVNIDB3Y4OWLAN4NT7KTAC","YCH5WGGP3PPG2PUNVJIJ6SQXDPYU7NGCVQEJYN27B6FYV5JYQOMQC","QYOCQUIWNSZNLCPDJCKERKC6BXBUNTE6AJCFYL4WDRU32LFX37XQC","IBUD4SUGA4IS6HUQIHVJJOFS4CMTWJMTMXS4LWGFVK4PFUFKE5LAC","O6734I3LMVTKXE5Y7FR3EDGSVIJQHFATUPJJCMRYXD7KLAN6E4UQC","XCZABYMDLHLHXNTHZFCXPNP6VOCNYUROAQACE5SWBL5FJK2EB7WQC","7SQSGQOZRCHN3GGWPNFI36K2R7YZMOPXZP3FP4PYDDOZML5YIYOQC","EHBLDMND5ASGZTTLDLEA5RGQIAZTXZN4HBPGD5PB6FDGZGTJ33SQC","JPK7SJDQWLCNDXJQEQQHXBN4Y677BPQ5QBL55GRZ55RSP4GK4L4AC"]},"hunks":[{"Edit":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":2,"atom":{"NewVertex":{"up_context":[{"change":3,"pos":233}],"down_context":[{"change":3,"pos":233}],"flag":"BLOCK","start":0,"end":1,"inode":{"change":3,"pos":204}}},"contents":[{"Add":""}]}},{"Edit":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":4,"atom":{"NewVertex":{"up_context":[{"change":3,"pos":269}],"down_context":[{"change":3,"pos":0}],"flag":"BLOCK","start":2,"end":38,"inode":{"change":3,"pos":204}}},"contents":[{"Add":"const Board = @import(\"Board.zig\");"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":8,"ins":{"up_context":[{"change":3,"pos":47}],"down_context":[{"change":3,"pos":228}],"flag":"BLOCK","start":39,"end":220,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":47},"to":{"change":3,"start":47,"end":228},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" pawn_attacks: [2][64]Board.BoardType = genPawnAttacks(),"},{"Add":" king_attacks: [64]Board.BoardType = genKingAttacks(),"},{"Add":" knight_attacks: [64]Board.BoardType = genKnightAttacks(),"}],"del_contents":[{"Del":" pawn_attacks: [2][64]Chess.BoardType = genPawnAttacks(),\n king_attacks: [64]Chess.BoardType = genKingAttacks(),\n knight_attacks: [64]Chess.BoardType = genKnightAttacks(),\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":13,"ins":{"up_context":[{"change":3,"pos":249}],"down_context":[{"change":3,"pos":2871}],"flag":"BLOCK","start":221,"end":2843,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":249},"to":{"change":3,"start":249,"end":2871},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const bishop_magic: [64]Board.BoardType = .{ 9241390835893862432, 9234710240556097536, 1227239730261824640, 577604527957049348, 6918659473418780672, 351888113804529668, 2328924575914001472, 4614013701991826049, 2331927815258656, 9016004274033184, 2305860618585916944, 648597650767120384, 577061163230053010, 579277706207166480, 4614220409926336512, 580964498095089664, 4616199239888937985, 1126041776325888, 616996207142899796, 10141929783173120, 5630608183136385, 36873230555873632, 181275456685879328, 576743335520240152, 2603115769260982529, 2380875882396914688, 2289189183030272, 171145581949894664, 1153203048319827969, 2305913930985283584, 72657961755345152, 1127003718435328, 148904939935000608, 282608955041792, 1153062518049211400, 10378688279935975552, 290279660069376, 290279660069376, 6922619801915492428, 6922619801915492428, 1158067358212916246, 2328924575914001472, 36319360414908928, 4611703757044990977, 1224980203021800448, 4521260535005248, 290561443953836160, 2310347987528229122, 2328924575914001472, 564053894369288, 1585408924206502016, 4675139272704, 144185593598050818, 7440091971840, 4612816883383795840, 9234710240556097536, 4614013701991826049, 580964498095089664, 83334186434036744, 648597650767120384, 17592766972164, 9439545093914103944, 2331927815258656, 9241390835893862432 };"},{"Add":" const rook_magic: [64]Board.BoardType = .{ 9259401108760043536, 594475563268280320, 144124055069409314, 72068610631143424, 72076285769418752, 108090789187420288, 324265770315940096, 9367487500631408770, 2305983747248373760, 14051934662285148160, 4612249107028804096, 72198881416318976, 9223653529145639440, 4648277836300289160, 1153204079162360320, 167055404054872320, 4791830278402211904, 13511073762115648, 10090880114674926608, 18332157638541321, 4902733343504729120, 141287311278592, 876517475657892112, 573945342918788, 35804994879488, 9223688714458236480, 72906490033217536, 844463587201024, 290486580455932032, 144117389246857344, 18295937913061888, 5406589228312428673, 9223442407754825769, 4503874543034369, 48431846559596576, 9295438429141602308, 18018869587216385, 3377768473690120, 2233852801025, 4785075694604450, 36030189125550082, 9227875774059790342, 9223407221495332992, 18332157638541321, 1155182100580696192, 35201820918080, 4612820723034226768, 45041495719411716, 603668391936256, 18084767791612032, 4612249107028804096, 15276649741245483264, 288371148000592256, 14628817498200408128, 1127068272296960, 4657003602455658752, 88510690829569, 2535612326510617, 144124055069409314, 2377918195506874625, 4611967527763988485, 1181631959278293026, 9232412290735146116, 261213468561048706 };"}],"del_contents":[{"Del":" const bishop_magic: [64]Chess.BoardType = .{ 9241390835893862432, 9234710240556097536, 1227239730261824640, 577604527957049348, 6918659473418780672, 351888113804529668, 2328924575914001472, 4614013701991826049, 2331927815258656, 9016004274033184, 2305860618585916944, 648597650767120384, 577061163230053010, 579277706207166480, 4614220409926336512, 580964498095089664, 4616199239888937985, 1126041776325888, 616996207142899796, 10141929783173120, 5630608183136385, 36873230555873632, 181275456685879328, 576743335520240152, 2603115769260982529, 2380875882396914688, 2289189183030272, 171145581949894664, 1153203048319827969, 2305913930985283584, 72657961755345152, 1127003718435328, 148904939935000608, 282608955041792, 1153062518049211400, 10378688279935975552, 290279660069376, 290279660069376, 6922619801915492428, 6922619801915492428, 1158067358212916246, 2328924575914001472, 36319360414908928, 4611703757044990977, 1224980203021800448, 4521260535005248, 290561443953836160, 2310347987528229122, 2328924575914001472, 564053894369288, 1585408924206502016, 4675139272704, 144185593598050818, 7440091971840, 4612816883383795840, 9234710240556097536, 4614013701991826049, 580964498095089664, 83334186434036744, 648597650767120384, 17592766972164, 9439545093914103944, 2331927815258656, 9241390835893862432 };\n const rook_magic: [64]Chess.BoardType = .{ 9259401108760043536, 594475563268280320, 144124055069409314, 72068610631143424, 72076285769418752, 108090789187420288, 324265770315940096, 9367487500631408770, 2305983747248373760, 14051934662285148160, 4612249107028804096, 72198881416318976, 9223653529145639440, 4648277836300289160, 1153204079162360320, 167055404054872320, 4791830278402211904, 13511073762115648, 10090880114674926608, 18332157638541321, 4902733343504729120, 141287311278592, 876517475657892112, 573945342918788, 35804994879488, 9223688714458236480, 72906490033217536, 844463587201024, 290486580455932032, 144117389246857344, 18295937913061888, 5406589228312428673, 9223442407754825769, 4503874543034369, 48431846559596576, 9295438429141602308, 18018869587216385, 3377768473690120, 2233852801025, 4785075694604450, 36030189125550082, 9227875774059790342, 9223407221495332992, 18332157638541321, 1155182100580696192, 35201820918080, 4612820723034226768, 45041495719411716, 603668391936256, 18084767791612032, 4612249107028804096, 15276649741245483264, 288371148000592256, 14628817498200408128, 1127068272296960, 4657003602455658752, 88510690829569, 2535612326510617, 144124055069409314, 2377918195506874625, 4611967527763988485, 1181631959278293026, 9232412290735146116, 261213468561048706 };\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":22,"ins":{"up_context":[{"change":3,"pos":3080}],"down_context":[{"change":3,"pos":3203}],"flag":"BLOCK","start":2844,"end":2967,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3080},"to":{"change":3,"start":3080,"end":3203},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var bishop_attacks: [64][512]Board.BoardType = undefined;"},{"Add":" var rook_attacks: [64][4096]Board.BoardType = undefined;"}],"del_contents":[{"Del":" var bishop_attacks: [64][512]Chess.BoardType = undefined;\n var rook_attacks: [64][4096]Chess.BoardType = undefined;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":34,"ins":{"up_context":[{"change":3,"pos":3422}],"down_context":[{"change":3,"pos":3478}],"flag":"BLOCK","start":2968,"end":3024,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3422},"to":{"change":3,"start":3422,"end":3478},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" for (std.enums.values(Board.Square)) |square| {"}],"del_contents":[{"Del":" for (std.enums.values(Chess.Square)) |square| {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":44,"ins":{"up_context":[{"change":3,"pos":3794}],"down_context":[{"change":3,"pos":3884}],"flag":"BLOCK","start":3025,"end":3129,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3794},"to":{"change":3,"start":0,"end":104},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const occupancy_idx = @as(Board.BoardType, 1) << @intCast(Board.SquareType, relevant_bits);"}],"del_contents":[{"Del":" const occupancy_idx = @as(Chess.BoardType, 1) << @intCast(Chess.SquareType, relevant_bits);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":51,"ins":{"up_context":[{"change":3,"pos":4127}],"down_context":[{"change":3,"pos":4297}],"flag":"BLOCK","start":3130,"end":3300,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4127},"to":{"change":3,"start":4127,"end":4297},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var res: Board.BoardType = undefined;"},{"Add":" _ = @mulWithOverflow(Board.BoardType, occupancy, bishop_magic[square.int()], &res);"}],"del_contents":[{"Del":" var res: Chess.BoardType = undefined;\n _ = @mulWithOverflow(Chess.BoardType, occupancy, bishop_magic[square.int()], &res);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":54,"ins":{"up_context":[{"change":3,"pos":4348}],"down_context":[{"change":3,"pos":4440}],"flag":"BLOCK","start":3301,"end":3407,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4348},"to":{"change":3,"start":105,"end":211},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" @intCast(Board.SquareType, @as(u7, 64) - bishop_relevant_bits[square.int()]);"}],"del_contents":[{"Del":" @intCast(Chess.SquareType, @as(u7, 64) - bishop_relevant_bits[square.int()]);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":61,"ins":{"up_context":[{"change":3,"pos":4727}],"down_context":[{"change":3,"pos":4895}],"flag":"BLOCK","start":3408,"end":3576,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4727},"to":{"change":3,"start":4727,"end":4895},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var res: Board.BoardType = undefined;"},{"Add":" _ = @mulWithOverflow(Board.BoardType, occupancy, rook_magic[square.int()], &res);"}],"del_contents":[{"Del":" var res: Chess.BoardType = undefined;\n _ = @mulWithOverflow(Chess.BoardType, occupancy, rook_magic[square.int()], &res);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":64,"ins":{"up_context":[{"change":3,"pos":4946}],"down_context":[{"change":3,"pos":5036}],"flag":"BLOCK","start":3577,"end":3681,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4946},"to":{"change":3,"start":212,"end":316},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" @intCast(Board.SquareType, @as(u7, 64) - rook_relevant_bits[square.int()]);"}],"del_contents":[{"Del":" @intCast(Chess.SquareType, @as(u7, 64) - rook_relevant_bits[square.int()]);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":75,"ins":{"up_context":[{"change":3,"pos":5289}],"down_context":[{"change":3,"pos":5396}],"flag":"BLOCK","start":3682,"end":3793,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5289},"to":{"change":3,"start":30,"end":141},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" pub fn getBishopAttacks(self: @This(), square: Board.Square, occupancy: Board.BoardType) Board.BoardType {"}],"del_contents":[{"Del":" pub fn getBishopAttacks(self: @This(), square: Chess.Square, occupancy: Chess.BoardType) Chess.BoardType {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":77,"ins":{"up_context":[{"change":3,"pos":5414}],"down_context":[{"change":3,"pos":5470}],"flag":"BLOCK","start":3794,"end":3850,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5414},"to":{"change":3,"start":5414,"end":5470},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var mut_occupancy: Board.BoardType = occupancy;"}],"del_contents":[{"Del":" var mut_occupancy: Chess.BoardType = occupancy;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":80,"ins":{"up_context":[{"change":3,"pos":5524}],"down_context":[{"change":3,"pos":5667}],"flag":"BLOCK","start":3851,"end":4061,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5524},"to":{"change":3,"start":75,"end":181},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":181},"to":{"change":3,"start":317,"end":421},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" _ = @mulWithOverflow(Board.BoardType, mut_occupancy, bishop_magic[square.int()], &mut_occupancy);"},{"Add":" mut_occupancy >>= @intCast(Board.SquareType, @as(u7, 64) - bishop_relevant_bits[square.int()]);"}],"del_contents":[{"Del":" _ = @mulWithOverflow(Chess.BoardType, mut_occupancy, bishop_magic[square.int()], &mut_occupancy);\n"},{"Del":" mut_occupancy >>= @intCast(Chess.SquareType, @as(u7, 64) - bishop_relevant_bits[square.int()]);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":86,"ins":{"up_context":[{"change":3,"pos":5735}],"down_context":[{"change":3,"pos":5840}],"flag":"BLOCK","start":4062,"end":4171,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5735},"to":{"change":3,"start":142,"end":251},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" pub fn getRookAttacks(self: @This(), square: Board.Square, occupancy: Board.BoardType) Board.BoardType {"}],"del_contents":[{"Del":" pub fn getRookAttacks(self: @This(), square: Chess.Square, occupancy: Chess.BoardType) Chess.BoardType {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":88,"ins":{"up_context":[{"change":3,"pos":5858}],"down_context":[{"change":3,"pos":5914}],"flag":"BLOCK","start":4172,"end":4228,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5858},"to":{"change":3,"start":5858,"end":5914},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var mut_occupancy: Board.BoardType = occupancy;"}],"del_contents":[{"Del":" var mut_occupancy: Chess.BoardType = occupancy;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":91,"ins":{"up_context":[{"change":3,"pos":5966}],"down_context":[{"change":3,"pos":6105}],"flag":"BLOCK","start":4229,"end":4435,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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{\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":355,"ins":{"up_context":[{"change":3,"pos":6695}],"down_context":[{"change":3,"pos":6733}],"flag":"BLOCK","start":9277,"end":9315,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":6695},"to":{"change":3,"start":6695,"end":6733},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var attacks: Board.BoardType = 0;"}],"del_contents":[{"Del":" var attacks: Chess.BoardType = 0;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":360,"ins":{"up_context":[{"change":3,"pos":6756}],"down_context":[{"change":3,"pos":6806}],"flag":"BLOCK","start":9316,"end":9366,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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df);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":380,"ins":{"up_context":[{"change":3,"pos":7321}],"down_context":[{"change":3,"pos":7401}],"flag":"BLOCK","start":9440,"end":9493,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7321},"to":{"change":3,"start":1432,"end":1485},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" attacks |= @as(Board.BoardType, 1) << s;"}],"del_contents":[{"Del":" attacks |= @as(Chess.BoardType, 1) << s;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":388,"ins":{"up_context":[{"change":3,"pos":30}],"down_context":[{"change":3,"pos":137}],"flag":"BLOCK","start":9494,"end":9601,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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0;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":412,"ins":{"up_context":[{"change":3,"pos":663}],"down_context":[{"change":3,"pos":713}],"flag":"BLOCK","start":9641,"end":9691,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":663},"to":{"change":3,"start":663,"end":713},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" while (step < Board.SIZE) : (step += 1) {"}],"del_contents":[{"Del":" while (step < Chess.SIZE) : (step += 1) {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":421,"ins":{"up_context":[{"change":3,"pos":977}],"down_context":[{"change":3,"pos":1117}],"flag":"BLOCK","start":9692,"end":9819,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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DELETED","from":{"change":3,"pos":1326},"to":{"change":3,"start":1542,"end":1641},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var blocks = Board.BitBoard{};"},{"Add":" blocks.setSlice(&[_]Board.Square{ .c3, .b6, .f2 });"}],"del_contents":[{"Del":" var blocks = Chess.BitBoard{};\n blocks.setSlice(&[_]Chess.Square{ .c3, .b6, .f2 });\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":439,"ins":{"up_context":[{"change":3,"pos":1405}],"down_context":[{"change":3,"pos":1468}],"flag":"BLOCK","start":9920,"end":10008,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1405},"to":{"change":3,"start":1642,"end":1730},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const got = attackWithBlocker(@bitCast(Board.BoardType, blocks), .d4, .bishop);"}],"del_contents":[{"Del":" const got = attackWithBlocker(@bitCast(Chess.BoardType, blocks), .d4, .bishop);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":441,"ins":{"up_context":[{"change":3,"pos":1469}],"down_context":[{"change":3,"pos":2}],"flag":"BLOCK","start":10009,"end":10130,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1469},"to":{"change":3,"start":1731,"end":1766},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":1766},"to":{"change":3,"start":1491,"end":1577},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1491},"to":{"change":3,"start":1491,"end":1577},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var bb = Board.BitBoard{};"},{"Add":" bb.setSlice(&[_]Board.Square{ .c3, .f2, .e3, .c5, .b6, .e5, .f6, .g7, .h8 });"}],"del_contents":[{"Del":" var bb = Chess.BitBoard{};\n"},{"Del":" bb.setSlice(&[_]Chess.Square{ .c3, .f2, .e3, .c5, .b6, .e5, .f6, .g7, .h8 });\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":444,"ins":{"up_context":[{"change":3,"pos":3}],"down_context":[{"change":3,"pos":1630}],"flag":"BLOCK","start":10131,"end":10203,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3},"to":{"change":3,"start":1767,"end":1839},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqual(bb, @bitCast(Board.BitBoard, got));"}],"del_contents":[{"Del":" try std.testing.expectEqual(bb, @bitCast(Chess.BitBoard, got));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":448,"ins":{"up_context":[{"change":3,"pos":1654}],"down_context":[{"change":3,"pos":1732}],"flag":"BLOCK","start":10204,"end":10303,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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.d4, .rook);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":453,"ins":{"up_context":[{"change":3,"pos":1795}],"down_context":[{"change":3,"pos":1898}],"flag":"BLOCK","start":10391,"end":10507,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1795},"to":{"change":3,"start":2027,"end":2062},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":2062},"to":{"change":3,"start":1817,"end":1898},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1817},"to":{"change":3,"start":1817,"end":1898},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var bb = Board.BitBoard{};"},{"Add":" bb.setSlice(&[_]Board.Square{ .c4, .b4, .d3, .d5, .e4, .f4, .g4, .h4 });"}],"del_contents":[{"Del":" var bb = Chess.BitBoard{};\n"},{"Del":" bb.setSlice(&[_]Chess.Square{ .c4, .b4, .d3, .d5, .e4, .f4, .g4, .h4 });\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":456,"ins":{"up_context":[{"change":3,"pos":1899}],"down_context":[{"change":3,"pos":1951}],"flag":"BLOCK","start":10508,"end":10580,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1899},"to":{"change":3,"start":2063,"end":2135},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqual(bb, @bitCast(Board.BitBoard, got));"}],"del_contents":[{"Del":" try std.testing.expectEqual(bb, @bitCast(Chess.BitBoard, got));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":460,"ins":{"up_context":[{"change":3,"pos":1975}],"down_context":[{"change":3,"pos":2041}],"flag":"BLOCK","start":10581,"end":10668,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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.rook);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":465,"ins":{"up_context":[{"change":3,"pos":2104}],"down_context":[{"change":3,"pos":2232}],"flag":"BLOCK","start":10756,"end":10897,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2104},"to":{"change":3,"start":2311,"end":2346},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":2346},"to":{"change":3,"start":2126,"end":2232},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2126},"to":{"change":3,"start":2126,"end":2232},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var bb = Board.BitBoard{};"},{"Add":" bb.setSlice(&[_]Board.Square{ .b8, .c8, .d8, .e8, .f8, .g8, .h7, .h6, .h5, .h4, .h3, .h2, .h1 });"}],"del_contents":[{"Del":" var bb = Chess.BitBoard{};\n"},{"Del":" bb.setSlice(&[_]Chess.Square{ .b8, .c8, .d8, .e8, .f8, .g8, .h7, .h6, .h5, .h4, .h3, .h2, .h1 });\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":468,"ins":{"up_context":[{"change":3,"pos":2233}],"down_context":[{"change":3,"pos":2285}],"flag":"BLOCK","start":10898,"end":10970,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2233},"to":{"change":3,"start":2347,"end":2419},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqual(bb, @bitCast(Board.BitBoard, got));"}],"del_contents":[{"Del":" try std.testing.expectEqual(bb, @bitCast(Chess.BitBoard, got));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":472,"ins":{"up_context":[{"change":3,"pos":2294}],"down_context":[{"change":3,"pos":153}],"flag":"BLOCK","start":10971,"end":11120,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"","flag":"DELETED","from":{"change":3,"pos":2294},"to":{"change":3,"start":3,"end":112},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3},"to":{"change":3,"start":3,"end":112},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":112},"to":{"change":3,"start":2420,"end":2460},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":"fn setOccupancy(index: usize, bits_in_mask: Board.BoardType, attack_mask: Board.BoardType) Board.BoardType {"},{"Add":" var occupancy: Board.BoardType = 0;"}],"del_contents":[{"Del":"fn setOccupancy(index: usize, bits_in_mask: Chess.BoardType, attack_mask: Chess.BoardType) Chess.BoardType {\n"},{"Del":" var occupancy: Chess.BoardType = 0;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":475,"ins":{"up_context":[{"change":3,"pos":154}],"down_context":[{"change":3,"pos":214}],"flag":"BLOCK","start":11121,"end":11168,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":154},"to":{"change":3,"start":2461,"end":2508},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var attack: Board.BoardType = attack_mask;"}],"del_contents":[{"Del":" var attack: Chess.BoardType = attack_mask;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":477,"ins":{"up_context":[{"change":3,"pos":215}],"down_context":[{"change":3,"pos":238}],"flag":"BLOCK","start":11169,"end":11206,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | 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@ctz(attack));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":482,"ins":{"up_context":[{"change":3,"pos":2587}],"down_context":[{"change":3,"pos":386}],"flag":"BLOCK","start":11273,"end":11390,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2587},"to":{"change":3,"start":2587,"end":2704},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" // if (attack & @as(Board.BoardType, 1) << square != 0)"},{"Add":" attack ^= @as(Board.BoardType, 1) << square;"}],"del_contents":[{"Del":" // if (attack & @as(Chess.BoardType, 1) << square != 0)\n attack ^= @as(Chess.BoardType, 1) << square;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":485,"ins":{"up_context":[{"change":3,"pos":387}],"down_context":[{"change":3,"pos":509}],"flag":"BLOCK","start":11391,"end":11512,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":387},"to":{"change":3,"start":387,"end":448},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":448},"to":{"change":3,"start":2705,"end":2765},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" if (index & @as(Board.BoardType, 1) << count != 0) {"},{"Add":" occupancy |= @as(Board.BoardType, 1) << square;"}],"del_contents":[{"Del":" if (index & @as(Chess.BoardType, 1) << count != 0) {\n"},{"Del":" occupancy |= @as(Chess.BoardType, 1) << square;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":496,"ins":{"up_context":[{"change":3,"pos":636}],"down_context":[{"change":3,"pos":2829}],"flag":"BLOCK","start":11513,"end":11553,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":636},"to":{"change":3,"start":2789,"end":2829},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var occupancy: Board.BoardType = 0;"}],"del_contents":[{"Del":" var occupancy: Chess.BoardType = 0;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":499,"ins":{"up_context":[{"change":3,"pos":757}],"down_context":[{"change":3,"pos":900}],"flag":"BLOCK","start":11554,"end":11697,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":757},"to":{"change":3,"start":757,"end":900},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var expected: Board.BitBoard = .{};"},{"Add":" expected.setSlice(&[_]Board.Square{ .a2, .a3, .a4, .a5, .a6, .a7, .b1, .c1, .d1, .e1, .f1, .g1 });"}],"del_contents":[{"Del":" var expected: Chess.BitBoard = .{};\n expected.setSlice(&[_]Chess.Square{ .a2, .a3, .a4, .a5, .a6, .a7, .b1, .c1, .d1, .e1, .f1, .g1 });\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":502,"ins":{"up_context":[{"change":3,"pos":901}],"down_context":[{"change":3,"pos":955}],"flag":"BLOCK","start":11698,"end":11778,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":901},"to":{"change":3,"start":2903,"end":2983},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqual(expected, @bitCast(Board.BitBoard, occupancy));"}],"del_contents":[{"Del":" try std.testing.expectEqual(expected, @bitCast(Chess.BitBoard, occupancy));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":505,"ins":{"up_context":[{"change":3,"pos":958}],"down_context":[{"change":3,"pos":1049}],"flag":"BLOCK","start":11779,"end":11870,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":958},"to":{"change":3,"start":958,"end":1049},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":"fn genRelevantOccupancy(piece: Chess.Pieces) [@typeInfo(Board.Square).Enum.fields.len]u4 {"}],"del_contents":[{"Del":"fn genRelevantOccupancy(piece: Chess.Pieces) [@typeInfo(Chess.Square).Enum.fields.len]u4 {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":508,"ins":{"up_context":[{"change":3,"pos":1088}],"down_context":[{"change":3,"pos":1140}],"flag":"BLOCK","start":11871,"end":11923,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1088},"to":{"change":3,"start":1088,"end":1140},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" for (std.enums.values(Board.Square)) |square| {"}],"del_contents":[{"Del":" for (std.enums.values(Chess.Square)) |square| {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":556,"ins":{"up_context":[{"change":3,"pos":2424}],"down_context":[{"change":3,"pos":2518}],"flag":"BLOCK","start":11924,"end":12018,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2424},"to":{"change":3,"start":2424,"end":2518},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":"fn findMagicNumber(square: Board.Square, relevant: u4, piece: Chess.Pieces) Board.BoardType {"}],"del_contents":[{"Del":"fn findMagicNumber(square: Chess.Square, relevant: u4, piece: Chess.Pieces) Chess.BoardType {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":560,"ins":{"up_context":[{"change":3,"pos":2621}],"down_context":[{"change":3,"pos":2677}],"flag":"BLOCK","start":12019,"end":12075,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2621},"to":{"change":3,"start":2621,"end":2677},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var occupancies: [4096]Board.BoardType = undefined;"}],"del_contents":[{"Del":" var occupancies: [4096]Chess.BoardType = undefined;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":562,"ins":{"up_context":[{"change":3,"pos":2678}],"down_context":[{"change":3,"pos":2730}],"flag":"BLOCK","start":12076,"end":12128,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2678},"to":{"change":3,"start":2678,"end":2730},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var attacks: [4096]Board.BoardType = undefined;"}],"del_contents":[{"Del":" var attacks: [4096]Chess.BoardType = undefined;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":564,"ins":{"up_context":[{"change":3,"pos":2731}],"down_context":[{"change":3,"pos":2780}],"flag":"BLOCK","start":12129,"end":12178,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2731},"to":{"change":3,"start":2731,"end":2780},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var used: [4096]Board.BoardType = undefined;"}],"del_contents":[{"Del":" var used: [4096]Chess.BoardType = undefined;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":569,"ins":{"up_context":[{"change":3,"pos":2878}],"down_context":[{"change":3,"pos":2973}],"flag":"BLOCK","start":12179,"end":12242,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2878},"to":{"change":3,"start":2878,"end":2941},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const occupancy_idx = @as(Board.BoardType, 1) << relevant;"}],"del_contents":[{"Del":" const occupancy_idx = @as(Chess.BoardType, 1) << relevant;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":585,"ins":{"up_context":[{"change":3,"pos":3421}],"down_context":[{"change":3,"pos":3542}],"flag":"BLOCK","start":12243,"end":12364,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3421},"to":{"change":3,"start":3421,"end":3542},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var tmp1: Board.BoardType = undefined;"},{"Add":" _ = @mulWithOverflow(Board.BoardType, attack_mask, magic, &tmp1);"}],"del_contents":[{"Del":" var tmp1: Chess.BoardType = undefined;\n _ = @mulWithOverflow(Chess.BoardType, attack_mask, magic, &tmp1);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":589,"ins":{"up_context":[{"change":3,"pos":3607}],"down_context":[{"change":3,"pos":3653}],"flag":"BLOCK","start":12365,"end":12411,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3607},"to":{"change":3,"start":3607,"end":3653},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" used = [_]Board.BoardType{0} ** 4096;"}],"del_contents":[{"Del":" used = [_]Chess.BoardType{0} ** 4096;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":594,"ins":{"up_context":[{"change":3,"pos":3781}],"down_context":[{"change":3,"pos":4032}],"flag":"BLOCK","start":12412,"end":12677,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3781},"to":{"change":3,"start":3781,"end":3932},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3932},"to":{"change":3,"start":775,"end":889},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var tmp2: Board.BoardType = undefined; // FIXME: ugly"},{"Add":" _ = @mulWithOverflow(Board.BoardType, occupancies[index], magic, &tmp2);"},{"Add":" var magic_index: usize = @intCast(usize, tmp2 >> @intCast(Board.SquareType, @as(u7, 64) - relevant));"}],"del_contents":[{"Del":" var tmp2: Chess.BoardType = undefined; // FIXME: ugly\n _ = @mulWithOverflow(Chess.BoardType, occupancies[index], magic, &tmp2);\n"},{"Del":" var magic_index: usize = @intCast(usize, tmp2 >> @intCast(Chess.SquareType, @as(u7, 64) - relevant));\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":618,"ins":{"up_context":[{"change":3,"pos":5051}],"down_context":[{"change":3,"pos":5238}],"flag":"BLOCK","start":12678,"end":12790,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5073},"to":{"change":3,"start":5073,"end":5128},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5181},"to":{"change":3,"start":5181,"end":5238},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var bishop_magic: [64]Board.BoardType = undefined;"},{"Add":" for (std.enums.values(Board.Square)) |square, idx| {"}],"del_contents":[{"Del":" var bishop_magic: [64]Chess.BoardType = undefined;\n"},{"Del":" for (std.enums.values(Chess.Square)) |square, idx| {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":627,"ins":{"up_context":[{"change":3,"pos":191}],"down_context":[{"change":3,"pos":1514}],"flag":"BLOCK","start":12791,"end":14114,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":191},"to":{"change":3,"start":191,"end":1514},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const expected_bishop_magic: [64]Board.BoardType = .{ 9241390835893862432, 9234710240556097536, 1227239730261824640, 577604527957049348, 6918659473418780672, 351888113804529668, 2328924575914001472, 4614013701991826049, 2331927815258656, 9016004274033184, 2305860618585916944, 648597650767120384, 577061163230053010, 579277706207166480, 4614220409926336512, 580964498095089664, 4616199239888937985, 1126041776325888, 616996207142899796, 10141929783173120, 5630608183136385, 36873230555873632, 181275456685879328, 576743335520240152, 2603115769260982529, 2380875882396914688, 2289189183030272, 171145581949894664, 1153203048319827969, 2305913930985283584, 72657961755345152, 1127003718435328, 148904939935000608, 282608955041792, 1153062518049211400, 10378688279935975552, 290279660069376, 290279660069376, 6922619801915492428, 6922619801915492428, 1158067358212916246, 2328924575914001472, 36319360414908928, 4611703757044990977, 1224980203021800448, 4521260535005248, 290561443953836160, 2310347987528229122, 2328924575914001472, 564053894369288, 1585408924206502016, 4675139272704, 144185593598050818, 7440091971840, 4612816883383795840, 9234710240556097536, 4614013701991826049, 580964498095089664, 83334186434036744, 648597650767120384, 17592766972164, 9439545093914103944, 2331927815258656, 9241390835893862432 };"}],"del_contents":[{"Del":" const expected_bishop_magic: [64]Chess.BoardType = .{ 9241390835893862432, 9234710240556097536, 1227239730261824640, 577604527957049348, 6918659473418780672, 351888113804529668, 2328924575914001472, 4614013701991826049, 2331927815258656, 9016004274033184, 2305860618585916944, 648597650767120384, 577061163230053010, 579277706207166480, 4614220409926336512, 580964498095089664, 4616199239888937985, 1126041776325888, 616996207142899796, 10141929783173120, 5630608183136385, 36873230555873632, 181275456685879328, 576743335520240152, 2603115769260982529, 2380875882396914688, 2289189183030272, 171145581949894664, 1153203048319827969, 2305913930985283584, 72657961755345152, 1127003718435328, 148904939935000608, 282608955041792, 1153062518049211400, 10378688279935975552, 290279660069376, 290279660069376, 6922619801915492428, 6922619801915492428, 1158067358212916246, 2328924575914001472, 36319360414908928, 4611703757044990977, 1224980203021800448, 4521260535005248, 290561443953836160, 2310347987528229122, 2328924575914001472, 564053894369288, 1585408924206502016, 4675139272704, 144185593598050818, 7440091971840, 4612816883383795840, 9234710240556097536, 4614013701991826049, 580964498095089664, 83334186434036744, 648597650767120384, 17592766972164, 9439545093914103944, 2331927815258656, 9241390835893862432 };\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":629,"ins":{"up_context":[{"change":3,"pos":1515}],"down_context":[{"change":3,"pos":1610}],"flag":"BLOCK","start":14115,"end":14210,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1515},"to":{"change":3,"start":1515,"end":1610},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqualSlices(Board.BoardType, &expected_bishop_magic, &bishop_magic);"}],"del_contents":[{"Del":" try std.testing.expectEqualSlices(Chess.BoardType, &expected_bishop_magic, &bishop_magic);\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":635,"ins":{"up_context":[{"change":3,"pos":1688}],"down_context":[{"change":3,"pos":5392}],"flag":"BLOCK","start":14211,"end":14321,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1688},"to":{"change":3,"start":1688,"end":1798},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" var rook_magic: [64]Board.BoardType = undefined;"},{"Add":" for (std.enums.values(Board.Square)) |square, idx| {"}],"del_contents":[{"Del":" var rook_magic: [64]Chess.BoardType = undefined;\n for (std.enums.values(Chess.Square)) |square, idx| {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":644,"ins":{"up_context":[{"change":3,"pos":5547}],"down_context":[{"change":3,"pos":3116}],"flag":"BLOCK","start":14322,"end":15639,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":5547},"to":{"change":3,"start":1799,"end":3116},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" const expected_rook_magic: [64]Board.BoardType = .{ 9259401108760043536, 594475563268280320, 144124055069409314, 72068610631143424, 72076285769418752, 108090789187420288, 324265770315940096, 9367487500631408770, 2305983747248373760, 14051934662285148160, 4612249107028804096, 72198881416318976, 9223653529145639440, 4648277836300289160, 1153204079162360320, 167055404054872320, 4791830278402211904, 13511073762115648, 10090880114674926608, 18332157638541321, 4902733343504729120, 141287311278592, 876517475657892112, 573945342918788, 35804994879488, 9223688714458236480, 72906490033217536, 844463587201024, 290486580455932032, 144117389246857344, 18295937913061888, 5406589228312428673, 9223442407754825769, 4503874543034369, 48431846559596576, 9295438429141602308, 18018869587216385, 3377768473690120, 2233852801025, 4785075694604450, 36030189125550082, 9227875774059790342, 9223407221495332992, 18332157638541321, 1155182100580696192, 35201820918080, 4612820723034226768, 45041495719411716, 603668391936256, 18084767791612032, 4612249107028804096, 15276649741245483264, 288371148000592256, 14628817498200408128, 1127068272296960, 4657003602455658752, 88510690829569, 2535612326510617, 144124055069409314, 2377918195506874625, 4611967527763988485, 1181631959278293026, 9232412290735146116, 261213468561048706 };"}],"del_contents":[{"Del":" const expected_rook_magic: [64]Chess.BoardType = .{ 9259401108760043536, 594475563268280320, 144124055069409314, 72068610631143424, 72076285769418752, 108090789187420288, 324265770315940096, 9367487500631408770, 2305983747248373760, 14051934662285148160, 4612249107028804096, 72198881416318976, 9223653529145639440, 4648277836300289160, 1153204079162360320, 167055404054872320, 4791830278402211904, 13511073762115648, 10090880114674926608, 18332157638541321, 4902733343504729120, 141287311278592, 876517475657892112, 573945342918788, 35804994879488, 9223688714458236480, 72906490033217536, 844463587201024, 290486580455932032, 144117389246857344, 18295937913061888, 5406589228312428673, 9223442407754825769, 4503874543034369, 48431846559596576, 9295438429141602308, 18018869587216385, 3377768473690120, 2233852801025, 4785075694604450, 36030189125550082, 9227875774059790342, 9223407221495332992, 18332157638541321, 1155182100580696192, 35201820918080, 4612820723034226768, 45041495719411716, 603668391936256, 18084767791612032, 4612249107028804096, 15276649741245483264, 288371148000592256, 14628817498200408128, 1127068272296960, 4657003602455658752, 88510690829569, 2535612326510617, 144124055069409314, 2377918195506874625, 4611967527763988485, 1181631959278293026, 9232412290735146116, 261213468561048706 };\n"}]}},{"Replacement":{"inode":{"change":3,"pos":204},"path":"src/attacks.zig","line":646,"ins":{"up_context":[{"change":3,"pos":3117}],"down_context":[{"change":3,"pos":5620}],"flag":"BLOCK","start":15640,"end":15731,"inode":{"change":3,"pos":204}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3117},"to":{"change":3,"start":3117,"end":3208},"introduced_by":3}],"inode":{"change":3,"pos":204}},"ins_contents":[{"Add":" try std.testing.expectEqualSlices(Board.BoardType, &expected_rook_magic, &rook_magic);"}],"del_contents":[{"Del":" try std.testing.expectEqualSlices(Chess.BoardType, &expected_rook_magic, &rook_magic);\n"}]}},{"Edit":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":2,"atom":{"EdgeMap":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7531},"to":{"change":3,"start":0,"end":25},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":25},"to":{"change":3,"start":100,"end":101},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7531},"to":{"change":3,"start":100,"end":101},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":101},"to":{"change":3,"start":316,"end":364},"introduced_by":3}],"inode":{"change":3,"pos":7502}}},"contents":[{"Del":"\nconst Str = []const u8;\n"},{"Del":"\n"},{"Del":"const Attacks = @import(\"attacks.zig\").Attacks;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":3,"ins":{"up_context":[{"change":3,"pos":7532}],"down_context":[{"change":3,"pos":7579}],"flag":"BLOCK","start":15732,"end":15768,"inode":{"change":3,"pos":7502}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7532},"to":{"change":3,"start":7532,"end":7552},"introduced_by":3}],"inode":{"change":3,"pos":7502}},"ins_contents":[{"Add":"const Board = @import(\"Board.zig\");"}],"del_contents":[{"Del":"pub const SIZE = 8;\n"}]}},{"Replacement":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":19,"ins":{"up_context":[{"change":3,"pos":381}],"down_context":[{"change":3,"pos":664}],"flag":"BLOCK","start":15769,"end":15791,"inode":{"change":3,"pos":7502}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":646},"to":{"change":3,"start":646,"end":664},"introduced_by":3}],"inode":{"change":3,"pos":7502}},"ins_contents":[{"Add":"pub const PE = enum {"}],"del_contents":[{"Del":"const PE = enum {\n"}]}},{"Replacement":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":34,"ins":{"up_context":[{"change":3,"pos":749}],"down_context":[{"change":3,"pos":780}],"flag":"BLOCK","start":15792,"end":15827,"inode":{"change":3,"pos":7502}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":749},"to":{"change":3,"start":749,"end":780},"introduced_by":3}],"inode":{"change":3,"pos":7502}},"ins_contents":[{"Add":" pub fn int(self: @This()) u4 {"}],"del_contents":[{"Del":" fn int(self: @This()) u4 {\n"}]}},{"Edit":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":53,"atom":{"EdgeMap":{"edges":[{"previous":"","flag":"DELETED","from":{"change":3,"pos":71},"to":{"change":3,"start":1159,"end":1176},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":1159},"to":{"change":3,"start":1159,"end":1176},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | 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on\n\n"},{"Del":" pub fn int(self: @This()) SquareType {\n return @intCast(SquareType, @enumToInt(self));\n"},{"Del":" }\n\n pub fn rank(self: @This()) u3 {\n return @intCast(u3, self.int() / SIZE);\n }\n\n pub fn file(self: @This()) u3 {\n return @intCast(u3, self.int() % SIZE);\n"},{"Del":" }\n"},{"Del":"};\n\n"},{"Del":"pub const BoardType = u64;\n"},{"Del":"pub const BitBoard = packed struct(BoardType) {\n"},{"Del":" // zig fmt: off\n a8:bool=false, b8:bool=false, c8:bool=false, d8:bool=false, e8:bool=false, f8:bool=false, g8:bool=false, h8:bool=false,\n a7:bool=false, b7:bool=false, c7:bool=false, d7:bool=false, e7:bool=false, f7:bool=false, g7:bool=false, h7:bool=false,\n a6:bool=false, b6:bool=false, c6:bool=false, d6:bool=false, e6:bool=false, f6:bool=false, g6:bool=false, h6:bool=false,\n a5:bool=false, b5:bool=false, c5:bool=false, d5:bool=false, e5:bool=false, f5:bool=false, g5:bool=false, h5:bool=false,\n a4:bool=false, b4:bool=false, c4:bool=false, d4:bool=false, e4:bool=false, f4:bool=false, g4:bool=false, h4:bool=false,\n a3:bool=false, b3:bool=false, c3:bool=false, d3:bool=false, e3:bool=false, f3:bool=false, g3:bool=false, h3:bool=false,\n a2:bool=false, b2:bool=false, c2:bool=false, d2:bool=false, e2:bool=false, f2:bool=false, g2:bool=false, h2:bool=false,\n a1:bool=false, b1:bool=false, c1:bool=false, d1:bool=false, e1:bool=false, f1:bool=false, g1:bool=false, h1:bool=false,\n // zig fmt: on\n"},{"Del":"\n"},{"Del":" fn set(self: *@This(), s: SquareType) void {\n"},{"Del":" var ret: BoardType = @bitCast(BoardType, self.*);\n ret |= @as(BoardType, 1) << s;\n self.* = @bitCast(BitBoard, ret);\n }\n"},{"Del":"\n pub fn setSlice(self: *@This(), squares: []const Square) void {\n"},{"Del":" var ret = @bitCast(BoardType, self.*);\n"},{"Del":" for (squares) |square| {\n"},{"Del":" ret |= @as(BoardType, 1) << square.int();\n"},{"Del":" }\n"},{"Del":" self.* = @bitCast(BitBoard, ret);\n"},{"Del":" }\n\n"},{"Del":" pub fn show(self: @This()) void {\n"},{"Del":" std.debug.print(\"\\n\", .{});\n std.debug.print(\"{s:>18}\\n\", .{\"0 1 2 3 4 5 6 7\"});\n std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});\n var rank: usize = 0;\n while (rank < SIZE) : (rank += 1) {\n var file: usize = 0;\n while (file < SIZE) : (file += 1) {\n if (file == 0) std.debug.print(\"{d}| \", .{rank});\n\n"},{"Del":" const square = @intCast(SquareType, rank * SIZE + file);\n"},{"Del":" const mask: usize = if (@bitCast(BoardType, self) & (@as(BoardType, 1) << square) != 0) 1 else 0;\n"},{"Del":" std.debug.print(\"{d} \", .{mask});\n }\n std.debug.print(\"|{d}\\n\", .{SIZE - rank});\n }\n std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});\n std.debug.print(\"{s:>18}\\n\", .{\"a b c d e f g h\"});\n\n"},{"Del":" std.debug.print(\"\\nBitBoard: {d}\\n\", .{@bitCast(BoardType, self)});\n"},{"Del":" }\n"},{"Del":"};\n"},{"Del":"\n"},{"Del":"const GameState = struct {\n"},{"Del":" bitboards: [12]BitBoard = blk: {\n var bbs: [12]BitBoard = undefined;\n for (bbs) |*bb| {\n bb.* = BitBoard{};\n"},{"Del":" }\n break :blk bbs;\n },\n"},{"Del":" // TODO: try with separate both occupancy\n"},{"Del":" occupancies: [@typeInfo(Colors).Enum.fields.len]BoardType = [_]BoardType{0} ** 2,\n"},{"Del":" attacks: Attacks,\n"},{"Del":" side: Colors = .white,\n"},{"Del":" enemy: Colors = .black,\n"},{"Del":" enpassant: ?Square = null,\n"},{"Del":" castling: Castling = .{},\n moves: std.BoundedArray(BitMove, 64) = std.BoundedArray(BitMove, 64).init(0) catch unreachable,\n"},{"Del":"\n fn reset(self: *@This()) void {\n for (self.bitboards) |*bb| {\n"},{"Del":" bb.* = .{};\n"},{"Del":" }\n"},{"Del":" self.castling = .{};\n self.occupancies = [_]BoardType{0} ** 2;\n self.moves.resize(0) catch unreachable;\n"},{"Del":" }\n\n"},{"Del":" fn init(FEN: ?Str) !@This() {\n var gs = GameState{ .attacks = Attacks.init() };\n if (FEN != null)\n try gs.parseFEN(FEN.?)\n else\n try gs.parseFEN(\"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1\");\n return gs;\n"},{"Del":" }\n\n fn backup(self: @This()) @This() {\n var new_gs: GameState = undefined;\n\n for (self.bitboards) |bb, idx| {\n new_gs.bitboards[idx] = bb;\n }\n for (self.occupancies) |occ, idx| {\n new_gs.occupancies[idx] = occ;\n }\n new_gs.side = self.side;\n new_gs.enpassant = self.enpassant;\n new_gs.castling = self.castling;\n\n return new_gs;\n"},{"Del":" }\n\n"},{"Del":" fn restore(self: *@This(), bck: @This()) void {\n for (bck.bitboards) |bb, idx| {\n self.bitboards[idx] = bb;\n }\n for (bck.occupancies) |occ, idx| {\n self.occupancies[idx] = occ;\n }\n self.side = bck.side;\n self.enpassant = bck.enpassant;\n self.castling = bck.castling;\n }\n\n"},{"Del":" fn occupBoth(self: @This()) BoardType {\n return self.occupancies[@enumToInt(Colors.white)] | self.occupancies[@enumToInt(Colors.black)];\n"},{"Del":" }\n\n fn show(self: @This()) void {\n std.debug.print(\"\\n\", .{});\n var rank: usize = 0;\n while (rank < SIZE) : (rank += 1) {\n var file: usize = 0;\n FILE: while (file < SIZE) : (file += 1) {\n if (file == 0) std.debug.print(\"{d}| \", .{SIZE - rank});\n\n"},{"Del":" const square = @intCast(SquareType, rank * SIZE + file);\n"},{"Del":"\n for (self.bitboards) |bb, idx| {\n"},{"Del":" if (@bitCast(BoardType, bb) & (@as(BoardType, 1) << square) != 0) {\n"},{"Del":" std.debug.print(\"{c} \", .{@intToEnum(PE, idx).char()});\n continue :FILE;\n }\n }\n std.debug.print(\". \", .{});\n }\n std.debug.print(\"\\n\", .{});\n }\n std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});\n std.debug.print(\"{s:>18}\\n\", .{\"a b c d e f g h\"});\n"},{"Del":"\n std.debug.print(\"Side to move: {any}\\n\", .{self.side});\n std.debug.print(\"Enpassant squares: {any}\\n\", .{self.enpassant});\n std.debug.print(\"Castling: {any}\\n\", .{self.castling});\n"},{"Del":" std.debug.print(\"Possible moves counter: {d}\\n\", .{self.moves.len});\n"},{"Del":" }\n\n fn parseFEN(self: *@This(), in: []const u8) !void {\n self.reset();\n\n // std.debug.print(\"in: {s}\\n\", .{in});\n\n // parse ranks\n"},{"Del":" var rank: SquareType = 0;\n var file: SquareType = 0;\n"},{"Del":" var idx: usize = 0;\n while (idx < in.len) : ({\n idx += 1;\n if (in[idx - 1] != '/') file += 1;\n }) {\n // std.debug.print(\"{c} {d}\\n\", .{ in[idx], rank * SIZE + file });\n const ch = in[idx];\n switch (ch) {\n '/' => {\n rank += 1;\n file = 0;\n },\n '0'...'9' => {\n"},{"Del":" file += try std.fmt.parseUnsigned(SquareType, in[idx .. idx + 1], 10) - 1;\n"},{"Del":" },\n 65...90 => { // uppercase\n"},{"Del":" self.occupancies[@enumToInt(Colors.white)] |= @as(BoardType, 1) << (rank * SIZE + file);\n"},{"Del":" switch (ch) {\n 'P' => self.bitboards[PE.P.int()].set(rank * SIZE + file),\n 'N' => self.bitboards[PE.N.int()].set(rank * SIZE + file),\n 'B' => self.bitboards[PE.B.int()].set(rank * SIZE + file),\n 'R' => self.bitboards[PE.R.int()].set(rank * SIZE + file),\n 'Q' => self.bitboards[PE.Q.int()].set(rank * SIZE + file),\n 'K' => self.bitboards[PE.K.int()].set(rank * SIZE + file),\n else => unreachable,\n }\n },\n 97...122 => { // lowercase\n"},{"Del":" self.occupancies[@enumToInt(Colors.black)] |= @as(BoardType, 1) << (rank * SIZE + file);\n"},{"Del":" switch (ch) {\n 'p' => self.bitboards[PE.p.int()].set(rank * SIZE + file),\n 'n' => self.bitboards[PE.n.int()].set(rank * SIZE + file),\n 'b' => self.bitboards[PE.b.int()].set(rank * SIZE + file),\n 'r' => self.bitboards[PE.r.int()].set(rank * SIZE + file),\n 'q' => self.bitboards[PE.q.int()].set(rank * SIZE + file),\n 'k' => self.bitboards[PE.k.int()].set(rank * SIZE + file),\n else => unreachable,\n }\n },\n ' ' => break,\n else => unreachable,\n }\n }\n\n // parse rest\n // std.debug.print(\"rest: {s}\\n\", .{in[idx..]});\n var parts = std.mem.tokenize(u8, in[idx..], \" \");\n\n // side\n const side = parts.next().?[0];\n // std.debug.print(\"side: {c}\\n\", .{side});\n switch (side) {\n"},{"Del":" 'w' => {\n self.side = .white;\n self.enemy = .black;\n },\n 'b' => {\n self.side = .black;\n self.enemy = .white;\n },\n"},{"Del":" else => unreachable,\n }\n\n // castling\n const castling = parts.next().?;\n // std.debug.print(\"castling: {s}\\n\", .{castling});\n for (castling) |ch| {\n switch (ch) {\n 'K' => self.castling.WK = true,\n 'Q' => self.castling.WQ = true,\n 'k' => self.castling.BK = true,\n 'q' => self.castling.BQ = true,\n '-' => break,\n else => unreachable,\n }\n }\n\n // enpassant\n const enpassant = parts.next().?;\n // std.debug.print(\"enpassant: {s}\\n\", .{enpassant});\n if (enpassant[0] != '-') {\n const f = enpassant[0] - 'a';\n"},{"Del":" const r = SIZE - @intCast(SquareType, try std.fmt.parseUnsigned(u3, enpassant[1..], 10));\n"},{"Del":" self.enpassant = @intToEnum(Square, r * SIZE + f);\n }\n\n return;\n"},{"Del":" }\n"},{"Del":"\n fn isSquareAttacked(self: @This(), square: Square, color: Colors) bool {\n switch (color) {\n .white => {\n // attacked by white pawns\n const pa = self.attacks.pawn_attacks[@enumToInt(Colors.black)][square.int()];\n if (pa & @bitCast(BoardType, self.bitboards[PE.P.int()]) != 0) return true;\n },\n .black => {\n const pa = self.attacks.pawn_attacks[@enumToInt(Colors.white)][square.int()];\n if (pa & @bitCast(BoardType, self.bitboards[PE.p.int()]) != 0) return true;\n },\n }\n\n // attacked by knight\n const na = self.attacks.knight_attacks[square.int()];\n const nbb = switch (color) {\n .white => self.bitboards[PE.N.int()],\n .black => self.bitboards[PE.n.int()],\n };\n if (na & @bitCast(BoardType, nbb) != 0) return true;\n\n // attacked by king\n const ka = self.attacks.king_attacks[square.int()];\n const kbb = switch (color) {\n .white => self.bitboards[PE.K.int()],\n .black => self.bitboards[PE.k.int()],\n };\n if (ka & @bitCast(BoardType, kbb) != 0) return true;\n\n // attacked by bishop\n const ba = self.attacks.getBishopAttacks(square, self.occupBoth());\n const bbb = switch (color) {\n .white => self.bitboards[PE.B.int()],\n .black => self.bitboards[PE.b.int()],\n };\n if (ba & @bitCast(BoardType, bbb) != 0) return true;\n\n // attacked by rook\n const ra = self.attacks.getRookAttacks(square, self.occupBoth());\n const rbb = switch (color) {\n .white => self.bitboards[PE.R.int()],\n .black => self.bitboards[PE.r.int()],\n };\n if (ra & @bitCast(BoardType, rbb) != 0) return true;\n\n // attacked by queen\n const qa = self.attacks.getQueenAttacks(square, self.occupBoth());\n const qbb = switch (color) {\n .white => self.bitboards[PE.Q.int()],\n .black => self.bitboards[PE.q.int()],\n };\n if (qa & @bitCast(BoardType, qbb) != 0) return true;\n\n return false;\n }\n\n fn sideAttacks(self: @This(), color: Colors) BoardType {\n var ret: BoardType = 0;\n for (std.enums.values(Square)) |square| {\n if (isSquareAttacked(self, square, color)) ret |= @as(BoardType, 1) << square.int();\n }\n return ret;\n }\n"},{"Del":"\n"},{"Del":" fn generateMoves(self: *@This()) !void {\n"},{"Del":" const pieces = switch (self.side) {\n"},{"Del":" .white => &[_]PE{ .P, .N, .B, .R, .Q, .K },\n .black => &[_]PE{ .p, .n, .b, .r, .q, .k },\n };\n\n for (pieces) |piece| {\n"},{"Del":" const board = @bitCast(BoardType, self.bitboards[piece.int()]);\n"},{"Del":"\n // generate pawn and castling moves\n switch (piece) {\n"},{"Del":" .P, .p => try self.pawnMoves(board, piece),\n"},{"Del":" .K, .k => {\n"},{"Del":" try self.castlingMoves(piece);\n try self.genMoves(board, piece);\n"},{"Del":" },\n"},{"Del":" .N, .n => try self.genMoves(board, piece),\n .B, .b => try self.genMoves(board, piece),\n .R, .r => try self.genMoves(board, piece),\n .Q, .q => try self.genMoves(board, piece),\n .none => unreachable,\n"},{"Del":" }\n }\n"},{"Del":" }\n\n"},{"Del":" fn pawnMoves(self: *@This(), board_in: BoardType, piece: PE) !void {\n"},{"Del":" var source_square: SquareType = undefined;\n var target_square: SquareType = undefined;\n"},{"Del":" var attacks: BoardType = undefined;\n"},{"Del":"\n const promote_options = switch (self.side) {\n .white => [_]PE{ .Q, .R, .B, .N },\n .black => 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DELETED","from":{"change":3,"pos":4161},"to":{"change":3,"start":6204,"end":6474},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":6474},"to":{"change":3,"start":4382,"end":4431},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4382},"to":{"change":3,"start":4382,"end":4431},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4431},"to":{"change":3,"start":6475,"end":6704},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":6704},"to":{"change":3,"start":4649,"end":4837},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4649},"to":{"change":3,"start":4649,"end":4837},"introduced_by":3}],"inode":{"change":3,"pos":7502}}},"contents":[{"Del":"\n var board = board_in;\n while (board != 0) {\n source_square = @intCast(SquareType, @ctz(board));\n // std.debug.print(\"pawn: {any}\\n\", .{@intToEnum(Square, source_square)});\n\n // early exit on underflow/overflow\n switch (self.side) {\n .white => if (@subWithOverflow(SquareType, source_square, 8, &target_square)) continue,\n .black => if (@addWithOverflow(SquareType, source_square, 8, &target_square)) continue,\n }\n"},{"Del":"\n"},{"Del":" const promote_condition = switch (self.side) {\n .white => source_square >= @enumToInt(Square.a7) and\n source_square <= @enumToInt(Square.h7),\n .black => source_square >= @enumToInt(Square.a2) and\n source_square <= @enumToInt(Square.h2),\n };\n"},{"Del":"\n"},{"Del":" // generate quiet moves\n if (self.occupBoth() & (@as(BoardType, 1) << target_square) == 0) {\n const double_step_condition = switch (self.side) {\n .white => source_square >= @enumToInt(Square.a2) and\n source_square <= @enumToInt(Square.h2) and\n self.occupBoth() & (@as(BoardType, 1) << (target_square - 8)) == 0,\n .black => source_square >= @enumToInt(Square.a7) and\n source_square <= @enumToInt(Square.h7) and\n self.occupBoth() & (@as(BoardType, 1) << (target_square + 8)) == 0,\n };\n\n if (promote_condition) {\n"},{"Del":" for (promote_options) |prom| {\n try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n .prom = prom,\n"},{"Del":" });\n }\n } else {\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n"},{"Del":" });\n"},{"Del":"\n"},{"Del":" // TODO: check: if single step is no-go, double can not work\n if (double_step_condition) {\n const double_target = switch (self.side) {\n .white => target_square - 8,\n .black => target_square + 8,\n };\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, double_target),\n .piece = piece,\n .double = true,\n"},{"Del":" });\n }\n }\n }\n"},{"Del":"\n"},{"Del":" // generate attacks\n"},{"Del":" attacks =\n"},{"Del":" self.attacks.pawn_attacks[@enumToInt(self.side)][source_square] &\n"},{"Del":" self.occupancies[@enumToInt(self.enemy)];\n"},{"Del":" while (attacks != 0) {\n target_square = @intCast(SquareType, @ctz(attacks));\n"},{"Del":"\n"},{"Del":" if (promote_condition) {\n"},{"Del":" for (promote_options) |prom| {\n try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n .prom = prom,\n .capture = true,\n"},{"Del":" });\n"},{"Del":" }\n"},{"Del":" } else {\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n .capture = true,\n"},{"Del":" });\n }\n\n // pop processed attack bit\n attacks ^= @as(BoardType, 1) << target_square;\n"},{"Del":" }\n"},{"Del":"\n"},{"Del":" // generate enpassant captures\n if (self.enpassant != null) {\n const enpassant_attacks = self.attacks.pawn_attacks[@enumToInt(self.side)][source_square] &\n @as(BoardType, 1) << self.enpassant.?.int();\n"},{"Del":"\n"},{"Del":" if (enpassant_attacks != 0) {\n const target_enpassant: SquareType = @intCast(u6, @ctz(enpassant_attacks));\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_enpassant),\n .piece = piece,\n .capture = true,\n"},{"Del":" });\n }\n }\n"},{"Del":"\n"},{"Del":" // pop processed board bit\n board ^= @as(BoardType, 1) << source_square;\n }\n }\n"},{"Del":"\n"},{"Del":" fn castlingMoves(self: *@This(), piece: PE) !void {\n { // king-side castling\n const king_side = switch (self.side) {\n .white => [_]Square{ .f1, .g1 },\n .black => [_]Square{ .f8, .g8 },\n };\n const attacked_king = switch (self.side) {\n .white => [_]Square{ .e1, .f1 },\n .black => [_]Square{ .e8, .f8 },\n };\n"},{"Del":"\n"},{"Del":" if ((self.side == .white and self.castling.WK) or\n (self.side == .black and self.castling.BK))\n {\n const OK = blk: {\n // make sure king side is emptry\n for (king_side) |square| {\n if (self.occupBoth() & @as(BoardType, 1) << square.int() != 0) break :blk false;\n }\n"},{"Del":"\n"},{"Del":" // check that castling squares are not attacked\n for (attacked_king) |square| {\n if (self.isSquareAttacked(square, self.enemy)) break :blk false;\n }\n"},{"Del":"\n"},{"Del":" break :blk true;\n };\n\n if (OK) {\n try self.moves.append(BitMove{\n .source = attacked_king[0],\n .target = king_side[1],\n .piece = piece,\n });\n }\n"},{"Del":" }\n"},{"Del":" }\n"},{"Del":"\n"},{"Del":" { // queen-side castling\n const queen_side = switch (self.side) {\n .white => [_]Square{ .d1, .c1, .b1 },\n .black => [_]Square{ .d8, .c8, .b8 },\n };\n const attacked_queen = switch (self.side) {\n .white => [_]Square{ .e1, .d1 },\n .black => [_]Square{ .e8, .d8 },\n };\n\n if ((self.side == .white and self.castling.WQ) or\n (self.side == .black and self.castling.BQ))\n {\n const OK = blk: {\n // make sure queen side is emptry\n for (queen_side) |square| {\n if (self.occupBoth() & @as(BoardType, 1) << square.int() != 0) break :blk false;\n }\n\n // check that castling squares are not attacked\n for (attacked_queen) |square| {\n if (self.isSquareAttacked(square, self.enemy)) break :blk false;\n }\n\n break :blk true;\n };\n\n if (OK) {\n try self.moves.append(BitMove{\n .source = attacked_queen[0],\n .target = queen_side[1],\n .piece = piece,\n });\n }\n }\n"},{"Del":" }\n }\n\n"},{"Del":" fn genMoves(self: *@This(), board_in: BoardType, piece: PE) !void {\n"},{"Del":" var source_square: SquareType = undefined;\n var target_square: SquareType = undefined;\n var attacks: BoardType = undefined;\n\n var board = board_in;\n while (board != 0) {\n source_square = @intCast(SquareType, @ctz(board));\n\n const attack_mask = switch (piece) {\n .N, .n => self.attacks.knight_attacks[source_square],\n .K, .k => self.attacks.king_attacks[source_square],\n .B, .b => self.attacks.getBishopAttacks(\n @intToEnum(Square, source_square),\n self.occupBoth(),\n ),\n .R, .r => self.attacks.getRookAttacks(\n @intToEnum(Square, source_square),\n self.occupBoth(),\n ),\n .Q, .q => self.attacks.getQueenAttacks(\n @intToEnum(Square, source_square),\n self.occupBoth(),\n ),\n"},{"Del":" .P, .p, .none => unreachable,\n"},{"Del":" };\n\n attacks = attack_mask &\n ~self.occupancies[@enumToInt(self.side)];\n\n while (attacks != 0) {\n target_square = @intCast(SquareType, @ctz(attacks));\n\n if (self.occupancies[@enumToInt(self.enemy)] &\n @as(BoardType, 1) << target_square != 0)\n {\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n .capture = true,\n"},{"Del":" });\n } else {\n"},{"Del":" try self.moves.append(BitMove{\n .source = @intToEnum(Square, source_square),\n .target = @intToEnum(Square, target_square),\n .piece = piece,\n"},{"Del":" });\n }\n\n attacks ^= @as(BoardType, 1) << target_square;\n }\n\n board ^= @as(BoardType, 1) << source_square;\n }\n"}]}},{"Edit":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":56,"atom":{"EdgeMap":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":6708},"to":{"change":3,"start":6708,"end":6970},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":4843},"to":{"change":3,"start":6731,"end":6734},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":6970},"to":{"change":3,"start":6731,"end":6734},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":6731},"to":{"change":3,"start":6731,"end":6734},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":6734},"to":{"change":3,"start":4857,"end":4858},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4857},"to":{"change":3,"start":4857,"end":4858},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4858},"to":{"change":3,"start":2918,"end":2944},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":2944},"to":{"change":3,"start":6971,"end":7078},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":7078},"to":{"change":3,"start":3040,"end":3142},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3040},"to":{"change":3,"start":3040,"end":3142},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":3142},"to":{"change":3,"start":4859,"end":4860},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3657},"to":{"change":3,"start":4859,"end":4860},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":4860},"to":{"change":3,"start":3143,"end":3218},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":3218},"to":{"change":3,"start":3657,"end":3659},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":4970},"to":{"change":3,"start":3657,"end":3659},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3657},"to":{"change":3,"start":3657,"end":3659},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3659},"to":{"change":3,"start":3130,"end":3154},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3154},"to":{"change":2,"start":770,"end":921},"introduced_by":2},{"previous":"","flag":"DELETED","from":{"change":2,"pos":921},"to":{"change":3,"start":7185,"end":7214},"introduced_by":2},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7185},"to":{"change":3,"start":7185,"end":7214},"introduced_by":3}],"inode":{"change":3,"pos":7502}}},"contents":[{"Del":"\npub const BitMoveType = u24;\nconst BitMove = packed struct(BitMoveType) {\n source: Square,\n target: Square,\n piece: PE,\n prom: PE = .none,\n capture: bool = false,\n double: bool = false,\n enpassant: bool = false,\n castling: bool = false,\n"},{"Del":"};\n"},{"Del":"\n"},{"Del":"test \"isSquareAttacked\" {\n"},{"Del":" var game = try GameState.init(\"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1\");\n"},{"Del":"\n var bb = BitBoard{};\n const got = game.sideAttacks(.white);\n bb = @bitCast(BitBoard, got);\n"},{"Del":"\n"},{"Del":" try std.testing.expectEqual(@as(BoardType, 9149624999898064896), got);\n"},{"Del":"}\n"},{"Del":"\ntest \"generateMoves\" {\n"},{"Del":" const tricky_position = \"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq c6 0 1\";\n var gs = try GameState.init(tricky_position);\n"},{"Del":"\n try gs.generateMoves();\n"}]}},{"Edit":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":57,"atom":{"EdgeMap":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3300},"to":{"change":2,"start":922,"end":1543},"introduced_by":2},{"previous":"","flag":"DELETED","from":{"change":2,"pos":1543},"to":{"change":3,"start":7230,"end":7232},"introduced_by":2},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7230},"to":{"change":3,"start":7230,"end":7232},"introduced_by":3},{"previous":"","flag":"DELETED","from":{"change":3,"pos":7232},"to":{"change":3,"start":3317,"end":3318},"introduced_by":3},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3317},"to":{"change":3,"start":3317,"end":3318},"introduced_by":3}],"inode":{"change":3,"pos":7502}}},"contents":[{"Del":" try std.testing.expectEqual(@as(usize, 49), gs.moves.len);\n}\n\ntest \"backup and restore\" {\n const tricky_position = \"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq c6 0 1\";\n var gs = try GameState.init(tricky_position);\n\n const backup = gs.backup();\n\n gs.bitboards[PE.P.int()].b8 = true;\n gs.enpassant = null;\n gs.castling = .{};\n gs.side = .black;\n\n gs.restore(backup);\n\n try std.testing.expectEqual(false, gs.bitboards[PE.P.int()].h8);\n try std.testing.expectEqual(Square.c6, gs.enpassant.?);\n try std.testing.expectEqual(@as(u4, 0b1111), @bitCast(u4, gs.castling));\n"},{"Del":"}\n"},{"Del":"\n"}]}},{"Replacement":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":58,"ins":{"up_context":[{"change":3,"pos":7255}],"down_context":[{"change":3,"pos":7314}],"flag":"BLOCK","start":15828,"end":15899,"inode":{"change":3,"pos":7502}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7255},"to":{"change":3,"start":7255,"end":7314},"introduced_by":3}],"inode":{"change":3,"pos":7502}},"ins_contents":[{"Add":" state: Board.GameState,"},{"Add":" history: std.ArrayList(Board.BitMove),"}],"del_contents":[{"Del":" state: GameState,\n history: std.ArrayList(BitMove),\n"}]}},{"Replacement":{"inode":{"change":3,"pos":7502},"path":"src/Chess.zig","line":63,"ins":{"up_context":[{"change":3,"pos":7403}],"down_context":[{"change":3,"pos":7527}],"flag":"BLOCK","start":15900,"end":16036,"inode":{"change":3,"pos":7502}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":7403},"to":{"change":3,"start":7403,"end":7527},"introduced_by":3}],"inode":{"change":3,"pos":7502}},"ins_contents":[{"Add":" game.state = Board.GameState.init(null) catch unreachable;"},{"Add":" game.history = std.ArrayList(Board.BitMove).init(allocator);"}],"del_contents":[{"Del":" game.state = GameState.init(null) catch unreachable;\n game.history = std.ArrayList(BitMove).init(allocator);\n"}]}},{"FileAdd":{"meta":{"basename":"Board.zig","metadata":0},"context":[{"change":23,"pos":15}],"contents":[{"Add":"const std = @import(\"std\");"},{"Add":""},{"Add":"const Str = []const u8;"},{"Add":""},{"Add":"const Chess = @import(\"Chess.zig\");"},{"Add":"const Attacks = @import(\"attacks.zig\").Attacks;"},{"Add":""},{"Add":"/// SIZE is row and column size of the chessboard."},{"Add":"pub const SIZE = 8;"},{"Add":""},{"Add":"pub const SquareType = u6;"},{"Add":"pub const Square = enum(SquareType) {"},{"Add":" // zig fmt: off"},{"Add":" a8, b8, c8, d8, e8, f8, g8, h8,"},{"Add":" a7, b7, c7, d7, e7, f7, g7, h7,"},{"Add":" a6, b6, c6, d6, e6, f6, g6, h6,"},{"Add":" a5, b5, c5, d5, e5, f5, g5, h5,"},{"Add":" a4, b4, c4, d4, e4, f4, g4, h4,"},{"Add":" a3, b3, c3, d3, e3, f3, g3, h3,"},{"Add":" a2, b2, c2, d2, e2, f2, g2, h2,"},{"Add":" a1, b1, c1, d1, e1, f1, g1, h1,"},{"Add":" // zig fmt: on"},{"Add":""},{"Add":" pub fn int(self: @This()) SquareType {"},{"Add":" return @intCast(SquareType, @enumToInt(self));"},{"Add":" }"},{"Add":""},{"Add":" pub fn rank(self: @This()) u3 {"},{"Add":" return @intCast(u3, self.int() / SIZE);"},{"Add":" }"},{"Add":""},{"Add":" pub fn file(self: @This()) u3 {"},{"Add":" return @intCast(u3, self.int() % SIZE);"},{"Add":" }"},{"Add":"};"},{"Add":""},{"Add":"pub const BoardType = u64;"},{"Add":"pub const BitBoard = packed struct(BoardType) {"},{"Add":" // zig fmt: off"},{"Add":" a8:bool=false, b8:bool=false, c8:bool=false, d8:bool=false, e8:bool=false, f8:bool=false, g8:bool=false, h8:bool=false,"},{"Add":" a7:bool=false, b7:bool=false, c7:bool=false, d7:bool=false, e7:bool=false, f7:bool=false, g7:bool=false, h7:bool=false,"},{"Add":" a6:bool=false, b6:bool=false, c6:bool=false, d6:bool=false, e6:bool=false, f6:bool=false, g6:bool=false, h6:bool=false,"},{"Add":" a5:bool=false, b5:bool=false, c5:bool=false, d5:bool=false, e5:bool=false, f5:bool=false, g5:bool=false, h5:bool=false,"},{"Add":" a4:bool=false, b4:bool=false, c4:bool=false, d4:bool=false, e4:bool=false, f4:bool=false, g4:bool=false, h4:bool=false,"},{"Add":" a3:bool=false, b3:bool=false, c3:bool=false, d3:bool=false, e3:bool=false, f3:bool=false, g3:bool=false, h3:bool=false,"},{"Add":" a2:bool=false, b2:bool=false, c2:bool=false, d2:bool=false, e2:bool=false, f2:bool=false, g2:bool=false, h2:bool=false,"},{"Add":" a1:bool=false, b1:bool=false, c1:bool=false, d1:bool=false, e1:bool=false, f1:bool=false, g1:bool=false, h1:bool=false,"},{"Add":" // zig fmt: on"},{"Add":""},{"Add":" fn set(self: *@This(), s: SquareType) void {"},{"Add":" var ret: BoardType = @bitCast(BoardType, self.*);"},{"Add":" ret |= @as(BoardType, 1) << s;"},{"Add":" self.* = @bitCast(BitBoard, ret);"},{"Add":" }"},{"Add":""},{"Add":" pub fn setSlice(self: *@This(), squares: []const Square) void {"},{"Add":" var ret = @bitCast(BoardType, self.*);"},{"Add":" for (squares) |square| {"},{"Add":" ret |= @as(BoardType, 1) << square.int();"},{"Add":" }"},{"Add":" self.* = @bitCast(BitBoard, ret);"},{"Add":" }"},{"Add":""},{"Add":" pub fn show(self: @This()) void {"},{"Add":" std.debug.print(\"\\n\", .{});"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"0 1 2 3 4 5 6 7\"});"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});"},{"Add":" var rank: usize = 0;"},{"Add":" while (rank < SIZE) : (rank += 1) {"},{"Add":" var file: usize = 0;"},{"Add":" while (file < SIZE) : (file += 1) {"},{"Add":" if (file == 0) std.debug.print(\"{d}| \", .{rank});"},{"Add":""},{"Add":" const square = @intCast(SquareType, rank * SIZE + file);"},{"Add":" const mask: usize = if (@bitCast(BoardType, self) & (@as(BoardType, 1) << square) != 0) 1 else 0;"},{"Add":" std.debug.print(\"{d} \", .{mask});"},{"Add":" }"},{"Add":" std.debug.print(\"|{d}\\n\", .{SIZE - rank});"},{"Add":" }"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"a b c d e f g h\"});"},{"Add":""},{"Add":" std.debug.print(\"\\nBitBoard: {d}\\n\", .{@bitCast(BoardType, self)});"},{"Add":" }"},{"Add":"};"},{"Add":""},{"Add":"pub const BitMoveType = u24;"},{"Add":"pub const BitMove = packed struct(BitMoveType) {"},{"Add":" source: Square,"},{"Add":" target: Square,"},{"Add":" piece: Chess.PE,"},{"Add":" prom: Chess.PE = .none,"},{"Add":" capture: bool = false,"},{"Add":" double: bool = false,"},{"Add":" enpassant: bool = false,"},{"Add":" castling: bool = false,"},{"Add":"};"},{"Add":""},{"Add":"const Castling = packed struct {"},{"Add":" WK: bool = false,"},{"Add":" WQ: bool = false,"},{"Add":" BK: bool = false,"},{"Add":" BQ: bool = false,"},{"Add":"};"},{"Add":""},{"Add":"pub const GameState = struct {"},{"Add":" bitboards: [12]BitBoard = blk: {"},{"Add":" var bbs: [12]BitBoard = undefined;"},{"Add":" for (bbs) |*bb| {"},{"Add":" bb.* = BitBoard{};"},{"Add":" }"},{"Add":" break :blk bbs;"},{"Add":" },"},{"Add":" // TODO: try with separate both occupancy"},{"Add":" occupancies: [@typeInfo(Chess.Colors).Enum.fields.len]BoardType = [_]BoardType{0} ** 2,"},{"Add":" attacks: Attacks,"},{"Add":" side: Chess.Colors = .white,"},{"Add":" enemy: Chess.Colors = .black,"},{"Add":" enpassant: ?Square = null,"},{"Add":" castling: Castling = .{},"},{"Add":" moves: std.BoundedArray(BitMove, 64) = std.BoundedArray(BitMove, 64).init(0) catch unreachable,"},{"Add":""},{"Add":" fn reset(self: *@This()) void {"},{"Add":" for (self.bitboards) |*bb| {"},{"Add":" bb.* = .{};"},{"Add":" }"},{"Add":" self.castling = .{};"},{"Add":" self.occupancies = [_]BoardType{0} ** 2;"},{"Add":" self.moves.resize(0) catch unreachable;"},{"Add":" }"},{"Add":""},{"Add":" pub fn init(FEN: ?Str) !@This() {"},{"Add":" var gs = GameState{ .attacks = Attacks.init() };"},{"Add":" if (FEN != null)"},{"Add":" try gs.parseFEN(FEN.?)"},{"Add":" else"},{"Add":" try gs.parseFEN(\"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1\");"},{"Add":" return gs;"},{"Add":" }"},{"Add":""},{"Add":" fn backup(self: @This()) @This() {"},{"Add":" var new_gs: GameState = undefined;"},{"Add":""},{"Add":" for (self.bitboards) |bb, idx| {"},{"Add":" new_gs.bitboards[idx] = bb;"},{"Add":" }"},{"Add":" for (self.occupancies) |occ, idx| {"},{"Add":" new_gs.occupancies[idx] = occ;"},{"Add":" }"},{"Add":" new_gs.side = self.side;"},{"Add":" new_gs.enpassant = self.enpassant;"},{"Add":" new_gs.castling = self.castling;"},{"Add":""},{"Add":" return new_gs;"},{"Add":" }"},{"Add":""},{"Add":" fn restore(self: *@This(), bck: @This()) void {"},{"Add":" for (bck.bitboards) |bb, idx| {"},{"Add":" self.bitboards[idx] = bb;"},{"Add":" }"},{"Add":" for (bck.occupancies) |occ, idx| {"},{"Add":" self.occupancies[idx] = occ;"},{"Add":" }"},{"Add":" self.side = bck.side;"},{"Add":" self.enpassant = bck.enpassant;"},{"Add":" self.castling = bck.castling;"},{"Add":" }"},{"Add":""},{"Add":" fn occupBoth(self: @This()) BoardType {"},{"Add":" return self.occupancies[@enumToInt(Chess.Colors.white)] |"},{"Add":" self.occupancies[@enumToInt(Chess.Colors.black)];"},{"Add":" }"},{"Add":""},{"Add":" fn show(self: @This()) void {"},{"Add":" std.debug.print(\"\\n\", .{});"},{"Add":" var rank: usize = 0;"},{"Add":" while (rank < SIZE) : (rank += 1) {"},{"Add":" var file: usize = 0;"},{"Add":" FILE: while (file < SIZE) : (file += 1) {"},{"Add":" if (file == 0) std.debug.print(\"{d}| \", .{SIZE - rank});"},{"Add":""},{"Add":" const square = @intCast(SquareType, rank * SIZE + file);"},{"Add":""},{"Add":" for (self.bitboards) |bb, idx| {"},{"Add":" if (@bitCast(BoardType, bb) & (@as(BoardType, 1) << square) != 0) {"},{"Add":" std.debug.print(\"{c} \", .{@intToEnum(Chess.PE, idx).char()});"},{"Add":" continue :FILE;"},{"Add":" }"},{"Add":" }"},{"Add":" std.debug.print(\". \", .{});"},{"Add":" }"},{"Add":" std.debug.print(\"\\n\", .{});"},{"Add":" }"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"a b c d e f g h\"});"},{"Add":""},{"Add":" std.debug.print(\"Side to move: {any}\\n\", .{self.side});"},{"Add":" std.debug.print(\"Enpassant squares: {any}\\n\", .{self.enpassant});"},{"Add":" std.debug.print(\"Castling: {any}\\n\", .{self.castling});"},{"Add":" std.debug.print(\"Possible moves counter: {d}\\n\", .{self.moves.len});"},{"Add":" }"},{"Add":""},{"Add":" fn parseFEN(self: *@This(), in: []const u8) !void {"},{"Add":" self.reset();"},{"Add":""},{"Add":" // std.debug.print(\"in: {s}\\n\", .{in});"},{"Add":""},{"Add":" // parse ranks"},{"Add":" var rank: SquareType = 0;"},{"Add":" var file: SquareType = 0;"},{"Add":" var idx: usize = 0;"},{"Add":" while (idx < in.len) : ({"},{"Add":" idx += 1;"},{"Add":" if (in[idx - 1] != '/') file += 1;"},{"Add":" }) {"},{"Add":" // std.debug.print(\"{c} {d}\\n\", .{ in[idx], rank * SIZE + file });"},{"Add":" const ch = in[idx];"},{"Add":" switch (ch) {"},{"Add":" '/' => {"},{"Add":" rank += 1;"},{"Add":" file = 0;"},{"Add":" },"},{"Add":" '0'...'9' => {"},{"Add":" file += try std.fmt.parseUnsigned(SquareType, in[idx .. idx + 1], 10) - 1;"},{"Add":" },"},{"Add":" 65...90 => { // uppercase"},{"Add":" self.occupancies[@enumToInt(Chess.Colors.white)] |="},{"Add":" @as(BoardType, 1) << (rank * SIZE + file);"},{"Add":" switch (ch) {"},{"Add":" 'P' => self.bitboards[Chess.PE.P.int()].set(rank * SIZE + file),"},{"Add":" 'N' => self.bitboards[Chess.PE.N.int()].set(rank * SIZE + file),"},{"Add":" 'B' => self.bitboards[Chess.PE.B.int()].set(rank * SIZE + file),"},{"Add":" 'R' => self.bitboards[Chess.PE.R.int()].set(rank * SIZE + file),"},{"Add":" 'Q' => self.bitboards[Chess.PE.Q.int()].set(rank * SIZE + file),"},{"Add":" 'K' => self.bitboards[Chess.PE.K.int()].set(rank * SIZE + file),"},{"Add":" else => unreachable,"},{"Add":" }"},{"Add":" },"},{"Add":" 97...122 => { // lowercase"},{"Add":" self.occupancies[@enumToInt(Chess.Colors.black)] |="},{"Add":" @as(BoardType, 1) << (rank * SIZE + file);"},{"Add":" switch (ch) {"},{"Add":" 'p' => self.bitboards[Chess.PE.p.int()].set(rank * SIZE + file),"},{"Add":" 'n' => self.bitboards[Chess.PE.n.int()].set(rank * SIZE + file),"},{"Add":" 'b' => self.bitboards[Chess.PE.b.int()].set(rank * SIZE + file),"},{"Add":" 'r' => self.bitboards[Chess.PE.r.int()].set(rank * SIZE + file),"},{"Add":" 'q' => self.bitboards[Chess.PE.q.int()].set(rank * SIZE + file),"},{"Add":" 'k' => self.bitboards[Chess.PE.k.int()].set(rank * SIZE + file),"},{"Add":" else => unreachable,"},{"Add":" }"},{"Add":" },"},{"Add":" ' ' => break,"},{"Add":" else => unreachable,"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" // parse rest"},{"Add":" // std.debug.print(\"rest: {s}\\n\", .{in[idx..]});"},{"Add":" var parts = std.mem.tokenize(u8, in[idx..], \" \");"},{"Add":""},{"Add":" // side"},{"Add":" const side = parts.next().?[0];"},{"Add":" // std.debug.print(\"side: {c}\\n\", .{side});"},{"Add":" switch (side) {"},{"Add":" 'w' => {"},{"Add":" self.side = .white;"},{"Add":" self.enemy = .black;"},{"Add":" },"},{"Add":" 'b' => {"},{"Add":" self.side = .black;"},{"Add":" self.enemy = .white;"},{"Add":" },"},{"Add":" else => unreachable,"},{"Add":" }"},{"Add":""},{"Add":" // castling"},{"Add":" const castling = parts.next().?;"},{"Add":" // std.debug.print(\"castling: {s}\\n\", .{castling});"},{"Add":" for (castling) |ch| {"},{"Add":" switch (ch) {"},{"Add":" 'K' => self.castling.WK = true,"},{"Add":" 'Q' => self.castling.WQ = true,"},{"Add":" 'k' => self.castling.BK = true,"},{"Add":" 'q' => self.castling.BQ = true,"},{"Add":" '-' => break,"},{"Add":" else => unreachable,"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" // enpassant"},{"Add":" const enpassant = parts.next().?;"},{"Add":" // std.debug.print(\"enpassant: {s}\\n\", .{enpassant});"},{"Add":" if (enpassant[0] != '-') {"},{"Add":" const f = enpassant[0] - 'a';"},{"Add":" const r = SIZE - @intCast("},{"Add":" SquareType,"},{"Add":" try std.fmt.parseUnsigned(u3, enpassant[1..], 10),"},{"Add":" );"},{"Add":" self.enpassant = @intToEnum(Square, r * SIZE + f);"},{"Add":" }"},{"Add":""},{"Add":" return;"},{"Add":" }"},{"Add":""},{"Add":" fn isSquareAttacked(self: @This(), square: Square, color: Chess.Colors) bool {"},{"Add":" switch (color) {"},{"Add":" .white => {"},{"Add":" // attacked by white pawns"},{"Add":" const pa = self.attacks.pawn_attacks[@enumToInt(Chess.Colors.black)][square.int()];"},{"Add":" if (pa & @bitCast(BoardType, self.bitboards[Chess.PE.P.int()]) != 0) return true;"},{"Add":" },"},{"Add":" .black => {"},{"Add":" const pa = self.attacks.pawn_attacks[@enumToInt(Chess.Colors.white)][square.int()];"},{"Add":" if (pa & @bitCast(BoardType, self.bitboards[Chess.PE.p.int()]) != 0) return true;"},{"Add":" },"},{"Add":" }"},{"Add":""},{"Add":" // attacked by knight"},{"Add":" const na = self.attacks.knight_attacks[square.int()];"},{"Add":" const nbb = switch (color) {"},{"Add":" .white => self.bitboards[Chess.PE.N.int()],"},{"Add":" .black => self.bitboards[Chess.PE.n.int()],"},{"Add":" };"},{"Add":" if (na & @bitCast(BoardType, nbb) != 0) return true;"},{"Add":""},{"Add":" // attacked by king"},{"Add":" const ka = self.attacks.king_attacks[square.int()];"},{"Add":" const kbb = switch (color) {"},{"Add":" .white => self.bitboards[Chess.PE.K.int()],"},{"Add":" .black => self.bitboards[Chess.PE.k.int()],"},{"Add":" };"},{"Add":" if (ka & @bitCast(BoardType, kbb) != 0) return true;"},{"Add":""},{"Add":" // attacked by bishop"},{"Add":" const ba = self.attacks.getBishopAttacks(square, self.occupBoth());"},{"Add":" const bbb = switch (color) {"},{"Add":" .white => self.bitboards[Chess.PE.B.int()],"},{"Add":" .black => self.bitboards[Chess.PE.b.int()],"},{"Add":" };"},{"Add":" if (ba & @bitCast(BoardType, bbb) != 0) return true;"},{"Add":""},{"Add":" // attacked by rook"},{"Add":" const ra = self.attacks.getRookAttacks(square, self.occupBoth());"},{"Add":" const rbb = switch (color) {"},{"Add":" .white => self.bitboards[Chess.PE.R.int()],"},{"Add":" .black => self.bitboards[Chess.PE.r.int()],"},{"Add":" };"},{"Add":" if (ra & @bitCast(BoardType, rbb) != 0) return true;"},{"Add":""},{"Add":" // attacked by queen"},{"Add":" const qa = self.attacks.getQueenAttacks(square, self.occupBoth());"},{"Add":" const qbb = switch (color) {"},{"Add":" .white => self.bitboards[Chess.PE.Q.int()],"},{"Add":" .black => self.bitboards[Chess.PE.q.int()],"},{"Add":" };"},{"Add":" if (qa & @bitCast(BoardType, qbb) != 0) return true;"},{"Add":""},{"Add":" return false;"},{"Add":" }"},{"Add":""},{"Add":" fn sideAttacks(self: @This(), color: Chess.Colors) BoardType {"},{"Add":" var ret: BoardType = 0;"},{"Add":" for (std.enums.values(Square)) |square| {"},{"Add":" if (isSquareAttacked(self, square, color)) ret |= @as(BoardType, 1) << square.int();"},{"Add":" }"},{"Add":" return ret;"},{"Add":" }"},{"Add":""},{"Add":" fn generateMoves(self: *@This()) !void {"},{"Add":" const pieces = switch (self.side) {"},{"Add":" .white => &[_]Chess.PE{ .P, .N, .B, .R, .Q, .K },"},{"Add":" .black => &[_]Chess.PE{ .p, .n, .b, .r, .q, .k },"},{"Add":" };"},{"Add":""},{"Add":" for (pieces) |piece| {"},{"Add":" const board = @bitCast(BoardType, self.bitboards[piece.int()]);"},{"Add":""},{"Add":" // generate pawn and castling moves"},{"Add":" switch (piece) {"},{"Add":" .P, .p => try self.pawnMoves(board, piece),"},{"Add":" .K, .k => {"},{"Add":" try self.castlingMoves(piece);"},{"Add":" try self.genMoves(board, piece);"},{"Add":" },"},{"Add":" .N, .n => try self.genMoves(board, piece),"},{"Add":" .B, .b => try self.genMoves(board, piece),"},{"Add":" .R, .r => try self.genMoves(board, piece),"},{"Add":" .Q, .q => try self.genMoves(board, piece),"},{"Add":" .none => unreachable,"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" fn pawnMoves(self: *@This(), board_in: BoardType, piece: Chess.PE) !void {"},{"Add":" var source_square: SquareType = undefined;"},{"Add":" var target_square: SquareType = undefined;"},{"Add":" var attacks: BoardType = undefined;"},{"Add":""},{"Add":" const promote_options = switch (self.side) {"},{"Add":" .white => [_]Chess.PE{ .Q, .R, .B, .N },"},{"Add":" .black => [_]Chess.PE{ .q, .r, .b, .n },"},{"Add":" };"},{"Add":""},{"Add":" var board = board_in;"},{"Add":" while (board != 0) {"},{"Add":" source_square = @intCast(SquareType, @ctz(board));"},{"Add":""},{"Add":" // early exit on underflow/overflow"},{"Add":" switch (self.side) {"},{"Add":" .white => if (@subWithOverflow(SquareType, source_square, 8, &target_square))"},{"Add":" continue,"},{"Add":" .black => if (@addWithOverflow(SquareType, source_square, 8, &target_square))"},{"Add":" continue,"},{"Add":" }"},{"Add":""},{"Add":" const promote_condition = switch (self.side) {"},{"Add":" .white => source_square >= @enumToInt(Square.a7) and"},{"Add":" source_square <= @enumToInt(Square.h7),"},{"Add":" .black => source_square >= @enumToInt(Square.a2) and"},{"Add":" source_square <= @enumToInt(Square.h2),"},{"Add":" };"},{"Add":""},{"Add":" // generate quiet moves"},{"Add":" if (self.occupBoth() & (@as(BoardType, 1) << target_square) == 0) {"},{"Add":" const double_step_condition = switch (self.side) {"},{"Add":" .white => source_square >= @enumToInt(Square.a2) and"},{"Add":" source_square <= @enumToInt(Square.h2) and"},{"Add":" self.occupBoth() & (@as(BoardType, 1) << (target_square - 8)) == 0,"},{"Add":" .black => source_square >= @enumToInt(Square.a7) and"},{"Add":" source_square <= @enumToInt(Square.h7) and"},{"Add":" self.occupBoth() & (@as(BoardType, 1) << (target_square + 8)) == 0,"},{"Add":" };"},{"Add":""},{"Add":" if (promote_condition) {"},{"Add":" for (promote_options) |prom| {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" .prom = prom,"},{"Add":" });"},{"Add":" }"},{"Add":" } else {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" });"},{"Add":""},{"Add":" // TODO: check: if single step is no-go, double can not work"},{"Add":" if (double_step_condition) {"},{"Add":" const double_target = switch (self.side) {"},{"Add":" .white => target_square - 8,"},{"Add":" .black => target_square + 8,"},{"Add":" };"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, double_target),"},{"Add":" .piece = piece,"},{"Add":" .double = true,"},{"Add":" });"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" // generate attacks"},{"Add":" attacks ="},{"Add":" self.attacks.pawn_attacks[@enumToInt(self.side)][source_square] &"},{"Add":" self.occupancies[@enumToInt(self.enemy)];"},{"Add":" while (attacks != 0) {"},{"Add":" target_square = @intCast(SquareType, @ctz(attacks));"},{"Add":""},{"Add":" if (promote_condition) {"},{"Add":" for (promote_options) |prom| {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" .prom = prom,"},{"Add":" .capture = true,"},{"Add":" });"},{"Add":" }"},{"Add":" } else {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" .capture = true,"},{"Add":" });"},{"Add":" }"},{"Add":""},{"Add":" // pop processed attack bit"},{"Add":" attacks ^= @as(BoardType, 1) << target_square;"},{"Add":" }"},{"Add":""},{"Add":" // generate enpassant captures"},{"Add":" if (self.enpassant != null) {"},{"Add":" const enpassant_attacks = self.attacks.pawn_attacks[@enumToInt(self.side)][source_square] &"},{"Add":" @as(BoardType, 1) << self.enpassant.?.int();"},{"Add":""},{"Add":" if (enpassant_attacks != 0) {"},{"Add":" const target_enpassant: SquareType = @intCast(u6, @ctz(enpassant_attacks));"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_enpassant),"},{"Add":" .piece = piece,"},{"Add":" .capture = true,"},{"Add":" });"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" // pop processed board bit"},{"Add":" board ^= @as(BoardType, 1) << source_square;"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" fn castlingMoves(self: *@This(), piece: Chess.PE) !void {"},{"Add":" { // king-side castling"},{"Add":" const king_side = switch (self.side) {"},{"Add":" .white => [_]Square{ .f1, .g1 },"},{"Add":" .black => [_]Square{ .f8, .g8 },"},{"Add":" };"},{"Add":" const attacked_king = switch (self.side) {"},{"Add":" .white => [_]Square{ .e1, .f1 },"},{"Add":" .black => [_]Square{ .e8, .f8 },"},{"Add":" };"},{"Add":""},{"Add":" if ((self.side == .white and self.castling.WK) or"},{"Add":" (self.side == .black and self.castling.BK))"},{"Add":" {"},{"Add":" const OK = blk: {"},{"Add":" // make sure king side is emptry"},{"Add":" for (king_side) |square| {"},{"Add":" if (self.occupBoth() & @as(BoardType, 1) << square.int() != 0) break :blk false;"},{"Add":" }"},{"Add":""},{"Add":" // check that castling squares are not attacked"},{"Add":" for (attacked_king) |square| {"},{"Add":" if (self.isSquareAttacked(square, self.enemy)) break :blk false;"},{"Add":" }"},{"Add":""},{"Add":" break :blk true;"},{"Add":" };"},{"Add":""},{"Add":" if (OK) {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = attacked_king[0],"},{"Add":" .target = king_side[1],"},{"Add":" .piece = piece,"},{"Add":" });"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" { // queen-side castling"},{"Add":" const queen_side = switch (self.side) {"},{"Add":" .white => [_]Square{ .d1, .c1, .b1 },"},{"Add":" .black => [_]Square{ .d8, .c8, .b8 },"},{"Add":" };"},{"Add":" const attacked_queen = switch (self.side) {"},{"Add":" .white => [_]Square{ .e1, .d1 },"},{"Add":" .black => [_]Square{ .e8, .d8 },"},{"Add":" };"},{"Add":""},{"Add":" if ((self.side == .white and self.castling.WQ) or"},{"Add":" (self.side == .black and self.castling.BQ))"},{"Add":" {"},{"Add":" const OK = blk: {"},{"Add":" // make sure queen side is emptry"},{"Add":" for (queen_side) |square| {"},{"Add":" if (self.occupBoth() & @as(BoardType, 1) << square.int() != 0) break :blk false;"},{"Add":" }"},{"Add":""},{"Add":" // check that castling squares are not attacked"},{"Add":" for (attacked_queen) |square| {"},{"Add":" if (self.isSquareAttacked(square, self.enemy)) break :blk false;"},{"Add":" }"},{"Add":""},{"Add":" break :blk true;"},{"Add":" };"},{"Add":""},{"Add":" if (OK) {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = attacked_queen[0],"},{"Add":" .target = queen_side[1],"},{"Add":" .piece = piece,"},{"Add":" });"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" fn genMoves(self: *@This(), board_in: BoardType, piece: Chess.PE) !void {"},{"Add":" var source_square: SquareType = undefined;"},{"Add":" var target_square: SquareType = undefined;"},{"Add":" var attacks: BoardType = undefined;"},{"Add":""},{"Add":" var board = board_in;"},{"Add":" while (board != 0) {"},{"Add":" source_square = @intCast(SquareType, @ctz(board));"},{"Add":""},{"Add":" const attack_mask = switch (piece) {"},{"Add":" .N, .n => self.attacks.knight_attacks[source_square],"},{"Add":" .K, .k => self.attacks.king_attacks[source_square],"},{"Add":" .B, .b => self.attacks.getBishopAttacks("},{"Add":" @intToEnum(Square, source_square),"},{"Add":" self.occupBoth(),"},{"Add":" ),"},{"Add":" .R, .r => self.attacks.getRookAttacks("},{"Add":" @intToEnum(Square, source_square),"},{"Add":" self.occupBoth(),"},{"Add":" ),"},{"Add":" .Q, .q => self.attacks.getQueenAttacks("},{"Add":" @intToEnum(Square, source_square),"},{"Add":" self.occupBoth(),"},{"Add":" ),"},{"Add":" .P, .p, .none => unreachable,"},{"Add":" };"},{"Add":""},{"Add":" attacks = attack_mask &"},{"Add":" ~self.occupancies[@enumToInt(self.side)];"},{"Add":""},{"Add":" while (attacks != 0) {"},{"Add":" target_square = @intCast(SquareType, @ctz(attacks));"},{"Add":""},{"Add":" if (self.occupancies[@enumToInt(self.enemy)] &"},{"Add":" @as(BoardType, 1) << target_square != 0)"},{"Add":" {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" .capture = true,"},{"Add":" });"},{"Add":" } else {"},{"Add":" try self.moves.append(BitMove{"},{"Add":" .source = @intToEnum(Square, source_square),"},{"Add":" .target = @intToEnum(Square, target_square),"},{"Add":" .piece = piece,"},{"Add":" });"},{"Add":" }"},{"Add":""},{"Add":" attacks ^= @as(BoardType, 1) << target_square;"},{"Add":" }"},{"Add":""},{"Add":" board ^= @as(BoardType, 1) << source_square;"},{"Add":" }"},{"Add":" }"},{"Add":"};"},{"Add":""},{"Add":"test \"isSquareAttacked\" {"},{"Add":" var game = try GameState.init(\"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1\");"},{"Add":""},{"Add":" var bb = BitBoard{};"},{"Add":" const got = game.sideAttacks(.white);"},{"Add":" bb = @bitCast(BitBoard, got);"},{"Add":""},{"Add":" try std.testing.expectEqual(@as(BoardType, 9149624999898064896), got);"},{"Add":"}"},{"Add":""},{"Add":"test \"generateMoves\" {"},{"Add":" const tricky_position = \"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq c6 0 1\";"},{"Add":" var gs = try GameState.init(tricky_position);"},{"Add":""},{"Add":" try gs.generateMoves();"},{"Add":""},{"Add":" try std.testing.expectEqual(@as(usize, 49), gs.moves.len);"},{"Add":"}"},{"Add":""},{"Add":"test \"backup and restore\" {"},{"Add":" const tricky_position = \"r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq c6 0 1\";"},{"Add":" var gs = try GameState.init(tricky_position);"},{"Add":""},{"Add":" const backup = gs.backup();"},{"Add":""},{"Add":" gs.bitboards[Chess.PE.P.int()].b8 = true;"},{"Add":" gs.enpassant = null;"},{"Add":" gs.castling = .{};"},{"Add":" gs.side = .black;"},{"Add":""},{"Add":" gs.restore(backup);"},{"Add":""},{"Add":" try std.testing.expectEqual(false, gs.bitboards[Chess.PE.P.int()].h8);"},{"Add":" try std.testing.expectEqual(Square.c6, gs.enpassant.?);"},{"Add":" try std.testing.expectEqual(@as(u4, 0b1111), @bitCast(u4, gs.castling));"},{"Add":"}"}]}}],"owner":"voroskoi","repo":"pistike","token":"mtNBtLIE3WNr2QOEItt3xk28i0Qnrmnees8ws+73VR0=","login":null}

…

Dependencies

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