I used some kind of combination between XY wing and this to exclude "<9>"
- Code: Select all
*--------------------------------------------------------------------*
| | | |
| | <9> | 79 789 |
| | | 789 |
|----------------------+----------------------+----------------------|
| | | |
| | | |
| | | |
|----------------------+----------------------+----------------------|
| | 37 | 79 |
| | | |
| | 39 | |
*--------------------------------------------------------------------*