PlaySudoku.us
Expert · Puzzle #66
8
3
9
3
8
4
6
2
6
1
9
3
2
7
8
5
4
7
2
5
9
6
2
Techniques used
- Naked Single
- Hidden Single
- Naked Quad
- Naked Pair
- Pointing Pair
- Box-Line Reduction
- X-Wing
- XY-Wing
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.
"Chess is everything: art, science, and sport." — Anatoly Karpov
"Chess is everything: art, science, and sport." — Anatoly Karpov