2
5
7
3
3
9
6
7
3
2
8
4
6
6
4
4
1
7
5
8
1
3
2
6
4
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #156
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 26 of 81 |
| Technique score | 55.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 5 already sees all eight other digits in its row, column and box, so it can only be 1.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.