Set Circle (SC)
When you have circled a cell, you can mark all the other cells with the same number in the row or column as black
| 3 |
1 |
3 |
2 |
6 |
4 |
| 1 |
2 |
6 |
3 |
3 |
5 |
| 3 |
1 |
1 |
5 |
4 |
1 |
| 3 |
4 |
2 |
6 |
3 |
3 |
| 2 |
6 |
3 |
1 |
5 |
4 |
| 2 |
5 |
3 |
1 |
2 |
4 |
| 3 |
1 |
3 |
2 |
6 |
4 |
| 1 |
2 |
6 |
3 |
3 |
5 |
| 3 |
1 |
1 |
5 |
4 |
1 |
| 3 |
4 |
2 |
6 |
3 |
3 |
| 2 |
6 |
3 |
1 |
5 |
4 |
| 2 |
5 |
3 |
1 |
2 |
4 |