c/blackmagicfuckery · by Emperor@feddit.uk · 2yMatsuyama's Paradox https://files.catbox.moe/6ll5r5.mp4 11 points · 1 comments · view on lemmy.world
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puppetx@lemmy.world · 2 pts · 2y
A version of this. https://en.m.wikipedia.org/wiki/Missing_square_puzzle