The game with pentominoes on the 8x8 board is based on the game created by Solomon W. Golomb. The word "pentominoes" is a registered trademark of Solomon W. Golomb.
The 'digit' and 'alphabet' boards were taken from "Pentomino Alphanumerics" by Judd/Zosel in the Journal of Recreational Mathematics 3 (1978-79).
The 'animal' boards were taken from "Pentominoes" by Jon Millington (1987, Tarquin Publications).
Thanks to all the people who registered for earlier versions of Polyominoes. I wouldn't have done this without you!
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