LEVEL 4
Naked Pair
Two cells in a house contain the same two candidates.
How to find it
- Find two cells with an identical two-digit candidate set.
- Confirm both cells share a row, column or box.
- Remove both digits from other cells in that house.
Candidate-map demonstration
The violet cells mark the pattern and the gold cell marks the resulting placement or elimination. Treat this compact map as orientation; use the verified full puzzle below to practise the actual deduction.
••••
Common mistakes
- Using cells that do not share the required row, column, box or peer relationship.
- Removing a candidate before confirming every occurrence in the pattern.
- Confusing a possible pattern with a completed logical proof.
VERIFIED PRACTICE
Naked Pair training
Loading a mathematically verified puzzle state…