This is the puzzle
_
_
3
_
9
_
8
_
1
_
_
_
_
_
6
_
5
_
_
_
9
7
_
1
_
_
_
1
3
_
_
4
_
_
_
8
2
_
_
1
_
_
4
6
_
_
9
_
_
_
_
7
_
_
_
_
_
3
_
_
6
_
5
_
_
_
_
2
_
1
_
_
3
4
_
9
_
_
_
_
_
<- Transfers all single digits from grid back to start puzzle (Not submitted)
<- Submit and start with this puzzle.
After running algorithm
6 iterations, unique function changed 13