6
1
9
2
3
7
8
7
9
2
3
9
5
2
8
6
7
3
2
1
5
7
7
6
4
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #210
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 26 of 81 |
| Technique score | 57.4 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 6, column 4 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.