Naked Triple+
Naked Triple+: A set of cells that between them hold exactly as many digits, which then belong to nobody else.
How it works on this board
1, 2 and 5 must be used within the highlighted cells
7
6
5
6
4
9
3
7
1
2
8
8
1
4
3
5
7
9
3
8
4
7
9
4
9
8
6
7
2
4
5
1
6
9
8
3
7
9
7
2
4
6
2
4
5
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