Polyking

A polyking (or polyplet, or hinged polyomino) is a plane geometric figure formed by joining one or more equal squares edge to edge or corner to corner at 90°. It is a polyform with square cells. The polyominoes are a subset of the polykings. The name `polyking` refers to the king in chess. The n-kings are the n-square shapes which could be occu.....
Found on http://en.wikipedia.org/wiki/Polyking
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