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Hidden Pair

A Hidden Pair is a Hidden Subset of size 2.

When all candidates for 2 digits in a house are limited to only 2 cells, these cells must contain these 2 digits. Subsequently, all remaining candidates can be removed from these 2 cells.


The following example shows a Hidden Pair in the second row, for the digits 1 and 7. The red candidates can be eliminated.


This page was last modified 16:42, 25 December 2006.