Quote:
Originally Posted by Phil^
Heres one for you koen ( and others ) . You take a standard chessboard (8x8 = 64 squares) and remove two squares, one at the top left and the other at the bottom right. essentially the diagonal ones are taken off.
Can the remaining squares be covered by 31 dominos where each domino takes up two squares?
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No. You've removed two squares of the same colour, whereas a domino must cover a black one and a white one.