A jellyfish is a 4 by 4 version of a swordfish (swordfish are 3 by 3)
This jellyfish is defined by the rows, eliminations occur in the
colums.
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A Jellyfish is present
when a candidate is confined to four columns in four selected rows.
The problem with jellyfish
is that the candidate in question (5 in this case) can appear 2, 3, or
4 times in the four designated rows. This makes them particulary
hard to spot.
I've highlighted all 16 cells here to show the 4 by 4 nature of a
jellyfish. But as you can see, a 5 is not present in all of the
yellow cells.
(confused? click here for further
explanation)
The good news is you'll probably never need to find a jellyfish.
There's great X-wing of 5's here (look in rows 1 and 9). There's also a
swordfish of 5's in rows 1,6, and 9.
But now you can say that you've seen a jellyfish.
A 5 by 5 version of this is known as a Squirmbag.
Its another technique that you'll never need. But click the
link if you want to see one.
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