Polyking
![The 22 free tetrakings](/Images/godic/202502/03/Tetrakings5201.png")
![10 congruent mutilated chessboards 7x7 constructed with the 94 pseudo-pentominoes, or pentaplets](/Images/godic/202502/03/Pseudopentominoes-chain10-01.svg5201.png")
![](/Images/godic/202502/03/Pentakings5201.png")
![](/Images/godic/202502/03/Hexakings5201.png")
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 occupied by a king on an infinite chessboard in the course of legal moves.