2
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1
8
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9
2
1
4
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8
2
1
9
5
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6
Time 00:00
Mistakes 0
Ready
Hard Sudoku #153
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 25 of 81 |
| Technique score | 112.9 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 9, column 6 already sees all eight other digits in its row, column and box, so it can only be 3.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.