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  • ...whose book ''Polyominoes'' is a fascinating introduction to the subject of polyomino puzzles and techniques for solving them. Probably the best-known polyominoe ...every tetromino is a ''tromino'' - a polyomino made of three squares, or a polyomino of rank three - with an additional square attached to it. Every tromino is
    11 KB (1,782 words) - 21:39, 21 February 2010