2
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6
1
8
1
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9
4
1
5
8
7
8
5
6
4
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1
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6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #54
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 26 of 81 |
| Technique score | 29.8 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 7 already sees all eight other digits in its row, column and box, so it can only be 2.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.