doku.su: Sudoku Coach

Learn Sudoku by understanding each move.

Sudoku Coach is a calm place to learn the rules, practice solving methods, and work through real puzzles without guessing. Every hint begins with valid Sudoku logic and reveals only as much as you ask for.

START AS A COMPLETE BEGINNER • Learn what a row, column, and 3 × 3 box mean. • See one ordinary-language explanation before the official technique name. • Follow short worked examples, then try the same idea yourself.

SOLVE WITH A COACH • Ask for a clue from your current grid. • Reveal the reasoning one step at a time. • Discuss your reasoning without letting generated text invent puzzle facts. • Keep solving offline; coached replies and sync return when you reconnect.

BUILD LASTING SKILL • Practice scanning, single-candidate moves, hidden placements, candidate notes, pairs, and advanced patterns. • Review mistakes from the exact position where they happened. • Track learning evidence, not just puzzle completion. • Continue on another device with an optional account.

FREE INCLUDES • A daily puzzle • Beginner lessons • Unlimited coaching for your first three puzzles • Basic progress tracking

COACHING SUBSCRIPTION Coaching unlocks unlimited coached puzzles, the full lesson library, unlimited hints and undos, personalized practice, spaced mistake review, and full progress history.

The monthly price is shown before purchase and may vary by region. Payment is charged to your App Store account. The subscription renews automatically unless cancelled in App Store settings at least 24 hours before the end of the current period. You can restore purchases and manage the subscription from Account inside the app.

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