Partner Check
Medium
Used by Smart Hint
Only two cells of this run are empty, so they split the remaining sum between them — a digit whose partner (remaining sum minus it) can't go in the other cell is impossible.
- Cells that establish the pattern
- Digit ruled out
How it works
- Only two cells of this across run are still empty, so they split its 11 between them — pick either cell's digit and the other one is forced.
- The right-hand cell sits in a 24-in-three down run, whose only combination is {7, 8, 9} — it can never hold a 6.
- So 5 is impossible on the left: it would need a 6 beside it. The other candidates all still have a partner — 2+9, 3+8, 4+7.