Dominoes on a board missing opposite corners
Question
Two diagonally opposite corner squares are removed from an chessboard, leaving squares. Can the remainder be covered exactly by dominoes, each covering two adjacent squares?
Short answer
No. Opposite corners have the same colour, so the board is left with squares of one colour and of the other. Every domino covers one light and one dark square, so dominoes would need of each.
Adapted from Crack, Heard on the Street, Q1.48, p.18; question and answer rewritten by SelfMadeQuant.com.
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