This genre was inspired by Unrectangles, in turn inspired by Shape Grid.
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Acknowledgements and Changes
2022-11-01 Thanks to わんど (wand125) for finding a bug in the recognition of slanted rectangles, that lead to a more coherent expansion of the genre rules.
2023-10-30 Thanks to spectria limina for noticing an implementation bug, now fixed, which spurred an update to the genre's highlighting and rule panels, plus a new puzzle.