9
4
6
2
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4
8
6
2
7
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6
3
4
7
8
8
1
3
9
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9
7
5
8
5
2
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #66
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 63 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 3 already sees all eight other digits in its row, column and box, so it can only be 6.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.