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Evil · Puzzle #567
5
2
9
1
6
5
2
4
3
9
6
4
9
2
1
3
8
5
6
7
2
4
7
Techniques used
- Naked Single
- Hidden Single
- Naked Triple
- Pointing Pair
- Box-Line Reduction
- Skyscraper
- Naked Pair
- Forcing Chains
Simulated annealing — a probabilistic optimization method — can solve Sudoku but cannot guarantee a unique solution.
Simulated annealing — a probabilistic optimization method — can solve Sudoku but cannot guarantee a unique solution.
Euler's "problème des 36 officiers" — an unsolvable 6×6 Latin square — is a direct mathematical precursor to Sudoku.
Euler's "problème des 36 officiers" — an unsolvable 6×6 Latin square — is a direct mathematical precursor to Sudoku.