Turbot Fish
Two strong links in one digit, joined by a weak link. The digit goes from every cell both ends see.
How it works on this board
Two strong links on 3 are joined by one weak link
1
4
8
5
8
2
5
7
4
5
4
9
9
4
8
3
5
6
5
3
6
2
4
1
8
9
6
5
4
3
4
8
5
8
5
4
1
5
6
2
4
8
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