>>11752864starting cell - number
1 - 1
3 - 1
(5-7) - 3
(9-14) - 6
__
1 - 1
3 - 1
(5-7) - 3
(10-15) - 6
__
1 - 1
3 - 1
(6-8) - 3
(10-15) - 6
__
1 - 1
4 - 1
(6-8) - 3
(10-15) - 6
__
2 - 1
4 - 1
(6-8) - 3
(10-15) - 6
__
Just look for the cells that are always filled in regardless of which possible outcome it is.
