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Solving the Eight Queens Chess Problem with a Lambda
Background "The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other; thus, a solution requires that no two queens...
Patrick2788 I think i dun it ... see attached
EDIT: I updated the function to take advantage of the fact that the 2nd 1/2 of the solutions are symmetric to the first 1/2 (I didn't optimize for the 1/2 of the middle value when n is odd) but now instead of crashing at n=12 it finds all the solutions for n=12 (14,200). i also updated the sheet format to make entry and viewing a little easier.
EDIT2: I fixed the above version and added better format and added the checkerboard output with a pulldown selector to pick which solution to show on the board:
BTW: I just tried 13 and it found 73,712 solutions and 14 found 365,596 solutions. Can you please verify them for me?
Great case!