Hidden Quad
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Revision as of 03:29, 4 June 2020 by Rooted (talk | contribs) (Created page with "A '''Hidden Quad''' is a Hidden Subset of size 4. When all candidates for 4 digits in a house are limited to only 4 cells, these cells must contain these...")
A Hidden Quad is a Hidden Subset of size 4.
When all candidates for 4 digits in a house are limited to only 4 cells, these cells must contain these 4 digits. Subsequently, all remaining candidates can be removed from these 4 cells.
Example
The following example shows a Hidden Quad in the 6th box.
