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Evil · Puzzle #825
8
9
4
3
6
1
3
9
8
9
2
1
3
7
5
2
6
8
5
3
4
2
6
4
Techniques used
- Hidden Single
- Pointing Pair
- Naked Single
- Box-Line Reduction
- Forcing Chains
- Naked Triple
- Naked Pair
- W-Wing
- XY-Wing
- XY-Chain
"The only true wisdom is in knowing you know nothing." — Socrates
"The only true wisdom is in knowing you know nothing." — Socrates
Puzzle difficulty in Sudoku is not just about the number of givens — the pattern of which cells are given matters just as much.
Puzzle difficulty in Sudoku is not just about the number of givens — the pattern of which cells are given matters just as much.