Adjacent Pair
Medium
Used by Smart Hint
Two equal numbers side by side: exactly one of them stays, so any other copy of that number in the row or column is rejected.
- Rejected
- Cells that establish the pattern
- Where the conclusion lands
How it works
- Two 7s sit side by side. Both staying breaks the duplicate rule; both rejected would touch — so exactly one of the two stays.
- Whichever one it is, the row keeps a 7 — so every OTHER 7 in that row duplicates it.
- Reject the 7 at the end of the row.