3
4
1
2
3
7
5
8
4
1
3
2
4
8
1
9
4
3
6
7
4
5
3
9
6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #100
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 25 of 81 |
| Technique score | 60.8 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 1 already sees all eight other digits in its row, column and box, so it can only be 9.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.