PlaySudoku.us
Easy · Puzzle #370
6
8
3
2
9
3
8
6
9
2
4
9
5
6
8
9
8
6
9
7
6
3
8
2
3
2
9
5
7
8
6
2
5
7
3
7
6
5
2
4
9
5
7
3
1
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.
The hardest Sudoku puzzles require techniques equivalent to propositional logic — the same foundation used in computer proofs.