The Franken Jellyfish is a fish pattern of the Franken Fish type. This type allows either the defining set or the secondary set to contain boxes, as well as lines.
Franken Jellyfish rrrb-cccc
This is a fish diagram of a Franken Jellyfish with a defining set of 3 rows with 1 box and a secondary set of 4 columns.
Franken Jellyfish rrbb-cccc
Here we see a Franken Jellyfish with a defining set of 2 rows with 2 boxes and a secondary set of 4 columns.
In this example, the defining set contains rows 2 & 8 and boxes 4 & 6. The secondary set contains columns 2, 3, 7 & 8. All the candidates in the defining set (marked with X) are located inside the secondary set. The remaining candidates from these 4 columns can be eliminated.
Configurations Which Look Like Franken Jellyfish but Are Not
This configuration using 2 non-aligned boxes dissolves into 3 Locked Candidates steps.
- Solving path
- Locked Candidates 1 in box 3 + row 3: eliminate remaining candidates in row 3.
- Locked Candidates 2 in box 1 + 3 with columns 1 + 2: eliminate candidates in box 4 for columns 1 + 2.
- Locked Candidates 2 in box 2 + 5 with columns 4 + 5: eliminate candidates in box 8 for columns 4 + 5.
A configuration with 2 boxes sharing the same 2 columns (swap boxes 4 and 5 in the diagram above) would not work either, because a hidden single is detected in the remaining column intersecting those boxes. This isolates the 2 boxes from the 2 rows.
See Also
