Difference between revisions of "Finned X-Wing"
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Latest revision as of 04:09, 4 June 2020
A Finned X-Wing is an X-Wing pattern that has one or more extra candidates in one of the 4 boxes. Like regular fish, it is a single-digit solving technique.
How it works
Here is an example of a Finned X-Wing:
The four cells marked X would be an X-Wing if the candidate in the cell marked F were not present. So either there is an X-Wing, or the candidate in F is true. In both cases, the starred cells cannot contain a candidate for this digit. We can eliminate those candidates.
The F cell is known as the fin.
