Post #2592392

@mjd@mathstodon.xyz @simontatham@hachyderm.io There are many puzzles of this general sort. The TwistyPuzzles.com museum categorises them as “Intersecting circles”. There are certainly variants that have more than two circles. https://twistypuzzles.com/app/museum/museum_search.php?function=show_puzzles&disp_style=standard&numpuzzles=500&page=1&mechanism=221