var buf: [512]u8 = undefined;

    var buf: [2048]u8 = undefined;

                    .N => if (in[4] != 'N') continue,
                    .n => if (in[4] != 'n') continue,
                    .B => if (in[4] != 'B') continue,
                    .b => if (in[4] != 'b') continue,
                    .R => if (in[4] != 'R') continue,
                    .r => if (in[4] != 'r') continue,
                    .Q => if (in[4] != 'Q') continue,
                    .q => if (in[4] != 'q') continue,

                    .N, .n => if (in[4] != 'n') continue,
                    .B, .b => if (in[4] != 'b') continue,
                    .R, .r => if (in[4] != 'r') continue,
                    .Q, .q => if (in[4] != 'q') continue,

    std.log.err("Illegal move found: \n\texpected: {any}\n\tgot: {s}\n", .{ move, in });

const DEFAULT_DEPTH = 8;

const DEFAULT_DEPTH = 10;

    movestogo: usize = 1,

    movestogo: usize = 30,