Shape Grid by Erich Friedman

Updated on Saturday, 5^th of October 2024 (created 2021-11-28) — Filed under: Erich Friedman List Paper Ported Puzzle polygon territory

Shape grid was included in the book Puzzle Box, volume 2 (Dover Publications).

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2021-12-07 Thanks Deusovi, Arvi Teikari (Hempuli), Samuel Kim (ubuntor) for feedback on the rules and to Stingby12 for detecting the extra narrow corner case.

2023-12-18 Fixed a regression found by justkirb

2024-10-05 Updated genre metadata with new information found by PinkHoodie, pushing back origins to 2010

Shape Grid Shape Grid puzzles Erich Friedman Stingby12 Acknowledgements and Changes