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This web page contains the abstract of my paper:

"Barring Rectangles from the Plane" with F.W. Barnes, Journal of Combinatorial Theory Series A, 33(1982), p 9-29.

Abstract: The problem of what proportion of squares of an infinite checkerboard must be barred so as to bar all a x b rectangles from the board is considered. If a<=b is assumed a complete answer is obtained except when the fractional part of b/a is contained in (1/3,1/2) and b/a > 2.

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