Pointing Pair/Triple
Medium
Used by Smart Hint
All of a digit's candidates in a box line up in one row or column, so it can be eliminated from the rest of that line.
- Cells that establish the pattern
- Where the conclusion lands
- Candidate ruled out
How it works
- Within this box, digit 3 only fits in A1 or C1 — both in row 1.
- Since one of those two cells must hold 3, no other cell in row 1 can be 3 — cross it off at D1 and G1.