Question

From a chessboard, two opposite corners are removed (the squares `a1` and `h8`, for example). Can you tile the remaining board with dominoes?

Difficulty level (1 very easy - 10 very hard): 3

Combinatorics -> Invariants Combinatorics -> Matchings Logic -> Reasoning / Logic Number Theory -> Division -> Parity (Even/Odd) Proof and Example -> Proof by Contradiction Combinatorics -> Colorings -> Chessboard Coloring Puzzles and Rebuses

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