Example of a Triple
This is a screenshot
Three Squares in the same
that together contain just three different
In this example, the Triple is the three Squares containing the Possibles 5, 6 and 8 (coloured yellow).
These three Squares MUST contain 5, 6 or 8. Therefore 5, 6 and 8 cannot be in any other Square in the same Box. The 6 and 8
(two occurances) outlined in orange are impossible solutions and can be removed.