LEVEL 6
Jellyfish
Four rows and four columns form a large fish elimination.
How to find it
- Map a candidate across four base rows.
- Confirm all occurrences fit four cover columns.
- Eliminate that candidate from other cells in the cover columns.
Candidate-map demonstration
The violet cells mark the pattern and the gold cell marks the resulting placement or elimination. Treat this compact map as orientation; use the verified full puzzle below to practise the actual deduction.
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Common mistakes
- Using cells that do not share the required row, column, box or peer relationship.
- Removing a candidate before confirming every occurrence in the pattern.
- Confusing a possible pattern with a completed logical proof.
VERIFIED PRACTICE
Jellyfish training
Loading a mathematically verified puzzle state…
Continue through the fish family
Fish techniques use the same base-line and cover-line idea at different sizes. Follow the sequence to understand exactly what changes before attempting a harder pattern.