World Solve — A living repository of problems worth solving.

What World Solve is

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.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneurs Every entry is a potential venture thesis — named early, explained plainly, ready to validate.

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We haven't resolved how many unit squares are needed, at minimum, to tile a square of a given odd size without overlaps or gaps.

open Global / Unspecified, Global

Certain simple-sounding tiling and packing puzzles remain surprisingly resistant to a complete general solution. These problems test the limits of combinatorics and geometric reasoning.

haven resolved many unit squares mathematics-logic

WS01241 · Logged by The Internet (future_watch) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01241 Title: We haven't resolved how many unit squares are needed, at minimum, to tile a square of a given odd size without overlaps or gaps. URL: https://worldsolve.org/index.php?api=problem&id=1241

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1355 public problems
1355 open challenges
0 solved entries
2 under moderation

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