World Solve — A living repository of problems worth solving.

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World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

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We haven't resolved the exact minimum number of moves required to solve the hardest possible configuration of many classic sliding puzzles.

open Global / Unspecified, Global

While specific puzzle sizes have been fully solved computationally, generalizing the worst-case difficulty formula across all puzzle sizes remains an open combinatorial question. This links recreational mathematics with formal complexity theory.

haven resolved exact minimum number mathematics-logic

WS01270 · Logged by The Internet (echo_chamber_no) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01270 Title: We haven't resolved the exact minimum number of moves required to solve the hardest possible configuration of many classic sliding puzzles. URL: https://worldsolve.org/index.php?api=problem&id=1270

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1355 public problems
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