This is a good problem, but it needs more test cases. There is no test with the King for instance, and there should be a true and false state test for every piece.
this doesn't take into account captures or moving a pawn 2 moves from its starting position. should it?
and the occasional other weird rules...
Captures and pawn 2 moves and castling and such aren't possible based upon the assumptions I stated (i.e. no other pieces on the board, the previous move was valid, etc)
Find all elements less than 0 or greater than 10 and replace them with NaN
Project Euler: Problem 2, Sum of even Fibonacci
Better bullseye matrix
Who knows the last digit of pi?
Multiples of a Number in a Given Range
Back to basics 18 - justification
Back to basics 8 - Matrix Diagonals
Back to basics 4 - Search Path
Toolbox check part 3
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