LEVEL 9

Forcing Chain

Follow linked implications until every branch proves the same result.

How to find it

Choose a candidate with two meaningful possibilities.
Follow each consequence carefully.
Keep any conclusion shared by all valid branches.

Logical demonstration

The violet cells represent the pattern; the gold cell represents the resulting placement or elimination. Verify every highlighted candidate belongs to the required houses before acting.

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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.

Practise the technique

Open a real puzzle, keep candidate notes accurate and ask Genius Coach to identify the next supported logical move.

Practise on a puzzle