1
5
8
7
6
1
5
1
9
6
8
2
3
1
2
6
9
5
7
7
1
4
9
1
2
6
6
9
7
5
6
4
Time 00:00
Mistakes 0
Ready
Expert Sudoku #31
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 32 of 81 |
| Technique score | 40.3 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 7 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.