LEVEL 7
W-Wing
Two matching bivalue cells connect through a strong link.
How to find it
- Find two non-peer cells with the same two candidates.
- Connect one candidate through a strong link.
- Eliminate the other candidate from cells seeing both endpoints.
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.
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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
W-Wing training
Loading a mathematically verified puzzle state…