3
1
8
4
4
2
5
8
6
3
2
1
9
6
5
7
5
8
4
9
1
7
3
6
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #39
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 25 of 81 |
| Technique score | 63.3 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 4 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.