Claire's Sudoku: Teaches Logic, boxed software artwork
A lesson in progress, with Claire explaining a move

Claire Kaplan teaches

Sudoku

Most people learn Sudoku by guessing until it works. Claire teaches the moves that let you prove every number instead.

  • 13 techniques, from your first square to the Swordfish
  • Six belts, each with a certificate signed by Claire
  • A one-minute drill to keep you sharp
  • Every puzzle free. No ads, and it works offline.
Download on the App Store
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By Claire Kaplan.

The weekly letter

From Claire’s Desk

One technique explained properly, something worth knowing from the wider world of sudoku, and what changed in the app. It arrives once a week.

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