Chessboard squares
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Amanda G. Chetwynd; Susan J. Rhodes
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Article
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1995
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Elsevier Science
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English
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In this paper we consider the problem posed by H~iggkvist on finding n x n arrays which are avoidable. An array is said to be avoidable if an n x n latin square on the same symbols can be found which differs from the given array in every cell. We describe a family of arrays, known as chessboard arra