Puzzle library / 12×12
12×12 Queens Puzzles
The 12×12 board is the master size, the largest Queens grid on the site: twelve regions and twelve queens. Only the full toolkit of techniques — from forced queens to test chains — will crack these. Every numbered 12×12 puzzle is precomputed and verified to have exactly one solution.
Difficulty: Master
All 300 12×12 puzzles
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Other board sizes
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