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Techniques · Hard
Naked Triple
Three cells in a unit whose candidates together use only three digits will take those three digits. Each cell does not need all three: 1/2, 2/3 and 1/3 is a triple too. Remove the three digits from the rest of the unit.
How to spot it
Look for cells with two or three notes drawn from the same three digits. Count the digits across the group: three cells, three digits.
Example
789
5
78
4
2368
79
1689
3789
12789
2
6
4
1
79
5
3789
789
789
1
3
28
268
5
689
4
2789
4
9
1578
6
157
2
3
78
578
1578
78
6
3
1457
14
2
789
5789
357
37
2
9
57
8
4
1
6
6
2348
18
28
12489
14
7
5
1389
1578
278
9
57
128
3
18
6
4
13578
3478
1578
57
1489
6
189
2
1389
In row 1, r1c1, r1c3 and r1c6 can only hold 7, 8 and 9, so 7, 8 and 9 can be removed from the other cells of row 1 (Naked Triple).
the pattern cells that lose a candidate (crossed out)