I see "The pencil marks in the lessons are X pt: KDP needs 7 pt or more."

Sudoku •1 min read •6 views •Updated Oct 1, 2026

The lesson diagrams are too small on this trim. Choose a bigger trim, or turn the lessons off.

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What are the solving lessons? Which books can have lessons? Which techniques get a lesson? What does "first needed at Hard" on a lesson mean?

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