SUDOKU

A complete and elegant Sudoku puzzle to train your logic: complete the 9x9 grid so that each row, column, and box contains a number from 1 to 9 without repetition. All puzzles have a unique solution and can be solved with pure logic, without guessing.

🧠 Instructive Hints
- The hint button doesn't just give you the number: it tells you which technique to use and why. You learn to reason as you play (unique candidate, unique location, and more).

🎯 Top-Tier Tools
- Notes (pencil) and auto-notes, unlimited undo/redo, configurable highlights.

- Error checking and adjustable error limit (3, 5, 10, or unlimited).

- 3 input modes (cell, digit, popup) to play the way you like.

📚 True Difficulty
- 4 levels (Basic → Master) with dozens of puzzles graded by required technique.

- Progress, stars, and statistics saved to your profile.

👨‍👩‍👧 Designed for families
- For all ages: trains concentration, memory, and reasoning.

- Light/dark theme and high contrast.

📴 Simple and clean
- Offline. No registration. No ads or in-app purchases.

From the first puzzle to the most difficult, this Sudoku helps you think better.