Rooted: Created page with "A '''Finned Jellyfish''' is the finned version of a Jellyfish. It is a single-digit solving technique. The formal definition for a Finned Jellyfis..."

2020-06-04T03:53:00Z

Created page with "A '''Finned Jellyfish''' is the finned version of a Jellyfish. It is a single-digit solving technique. The formal definition for a Finned Jellyfis..."

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A '''Finned Jellyfish''' is the [[Finned Fish|finned]] version of a [[Jellyfish]]. It is a [[single-digit]] [[solving technique]].

The formal definition for a Finned Jellyfish "in the rows" is:
: When 4 rows only have candidates for digit '''X''' in 4 columns and a single box that intersects with at least one of these 4 columns, then we can eliminate all candidates for digit '''X''' inside that box, which are located on one of these 4 columns, but not on one of the 4 rows.

Swap the words "rows" and "columns" in this definition for a Finned Jellyfish "in the columns".

== How it works ==

[[Image:finned jellyfish.png]]

The cells marked '''X''' almost form a Jellyfish in 4 rows and 4 columns. However, the [[fin]] cell in '''r2c1''' prevents us from exploiting this Jellyfish, because this [[candidate]] adds a 5th column to the pattern. If the fin were not present, we would be able to [[eliminate]] all remaining candidates from the columns containing an '''X'''. On the other hand, if the fin were present, we could eliminate all remaining candidates in [[box]] 1. In both cases, the starred candidates will be eliminated.

Like the basic Jellyfish, you do not need a candidate in each cell marked '''X'''. In fish techniques, the cells without a candidate are more important.

== See also ==
* [[Fish]]
* [[Jellyfish]]
* [[Finned Fish]]
* [[Finned X-Wing]]
* [[Finned Swordfish]]
* [[Sashimi Jellyfish]]

[[Category:Solving Techniques]]

Finned Jellyfish - Revision history

Rooted: Created page with "A '''Finned Jellyfish''' is the finned version of a Jellyfish. It is a single-digit solving technique. The formal definition for a Finned Jellyfis..."