A little sudoku-like app for helping first-graders practice addition

get rid of dubious heuristic helper

When we run into errors that aren't just assertion failures we should just be able to look at the entire call stack.

Created by  Kartik K. Agaram  on January 23, 2023
A3Z3S62K7DVN5F4J46A6A4FE6AMBBCGT2A44L6F34GSTM5EFOTBAC
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