1
8
6
2
5
6
4
3
5
1
3
5
4
7
2
5
9
1
6
6
2
8
1
3
8
3
1
7
6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #193
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 86.6 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 5, column 1 already sees all eight other digits in its row, column and box, so it can only be 4.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.