Squirmbag
Level 9 · Purple Belt
Overview
Squirmbag (or Sixfish) is a five-row, five-column fish pattern. It's extremely rare and only appears in very difficult puzzles.
How It Works
- Find five rows where a candidate is restricted to the same five columns.
- Each row must have the candidate in 2-5 cells within these columns.
- Eliminate the candidate from other cells in those five columns.
Example
Base rows: 1, 2, 5, 6 and 7. Check where digit 2 can appear in those rows.
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Tips & Patterns
- Squirmbags are extremely rare in hand-solvable puzzles.
- If you find yourself looking for Squirmbags, the puzzle is very difficult.
- Computer solvers are typically needed to reliably find these.