6
8
5
1
3
7
8
4
7
5
3
4
5
2
9
4
6
5
3
4
6
6
1
3
8
7
2
1
4
Time 00:00
Mistakes 0
Ready
Expert Sudoku #232
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 33.8 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 4 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.