Finned Swordfish

A Finned Swordfish is a Swordfish pattern with one or more extra candidates ("fins") that extend beyond the normal pattern.

Pattern Recognition

A Finned Swordfish has:

• A standard Swordfish pattern (candidate in 2-3 positions across three rows/columns)
• One or more extra candidates ("fins") in one of the base rows/columns
• The fins are confined to a single box that also contains part of the Swordfish

How It Works

Similar to Finned X-Wing, the fins limit where eliminations can occur. Eliminations are only valid in cells that see both the relevant Swordfish position and all the fins in that box.

Example

Documentation stub - examples coming soon.

Related Techniques

• Swordfish — The base pattern
• Finned X-Wing — Simpler finned pattern
• Jellyfish — Four-row/column fish