X-Wing
Hard
Used by Smart Hint
A digit's candidates in two rows fall in the exact same two columns, forming a rectangle — eliminate it from the rest of those columns.
- Cells that establish the pattern
- Where the conclusion lands
- Candidate ruled out
How it works
- Digit 4 only fits in columns C and G in both row 2 and row 3 — nowhere else in either row.
- That locks 4 into a rectangle across those two rows and two columns. Whichever row takes column C, the other must take column G — so 4 can be crossed off columns C and G in every other row, including row 6, at C6 and G6.