Above is a chessboard. Well, sort of. You were bargain hunting at a flea market and managed to find a discounted chessboard containing only 62 squares (instead of 64). Those squares marked in red above do not make up your flea market chessboard. A friend hands you a box of 31 dominos and gives you a challenge. One domino is as wide as one square on the chessboard and twice as long. Your friend asks you to show him how to cover every square on your chessboard using only the 31 dominos.
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