Swordfish
Expert
Used by Smart Hint
X-Wing's three-line cousin: a digit's candidates across three rows fit inside the same three columns (or vice versa).
- Cells that establish the pattern
- Where the conclusion lands
- Candidate ruled out
How it works
- Digit 8's candidates in row 1, row 4, and row 7 all fall inside columns B, E, and H — never more than that, and every row uses at least two of them.
- That's a Swordfish: across these three rows, 8 must occupy exactly those three columns. Any 8 elsewhere in columns B, E, or H can be eliminated — including all three cells in row 3 (B3, E3, H3).