Franken Swordfish

Level 10 · Brown Belt

Strategy:

Franken Fish

Requires:

Franken X-WingSwordfish

Learn after:

Franken Jellyfish

Overview

Franken Swordfish is a 3-house Franken fish that mixes boxes with rows and columns. The base and cover sets each use three houses, with at least one box included.

How It Works

  1. Find a digit confined within 3 base houses (rows, columns, or boxes).
  2. Cover with 3 houses from other types, including at least one box.
  3. Eliminate the digit from cover set cells not in the base set.

Example

Look for Franken Swordfish.

1

Franken Swordfish

Found a Franken Swordfish on digit 1. The base set is: Row 4, Row 5, Box 8.

2

Franken Swordfish

The cover set is: Column 4, Column 8, Box 4. Digit 1 in the base set is confined to these 3 cover houses.

3

Franken Swordfish

Any occurrence of 1 in the cover houses that is NOT in the base set can be eliminated.

4

Franken Swordfish

These highlighted cover-set candidates are outside the base set and must go: .

5

Franken Swordfish

Eliminate 1 from .

6

Result after applying the technique.

Tips & Patterns

  • Franken Swordfish are quite rare.
  • The mixing of boxes with lines makes the pattern harder to visualize than standard Swordfish.
  • Look for digits confined to specific box-line intersections.