The code works excellent down to 30 clues puzzles. It finds puzzles with 29 clues very slowly. Puzzles with 28 clues and less takes ages. (1-2 hours?) But Puzzles with 26 clues are very common. It is nearly impossible to find a puzzle with 26 clues.
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The code works excellent down to 30 clues puzzles. It finds puzzles with 29 clues very slowly. Puzzles with 28 clues and less takes ages. (1-2 hours?) But Puzzles with 26 clues are very common. It is nearly impossible to find a puzzle with 26 clues.