Sudoku for everyone, from first-timers to seasoned solvers.

Play classic and Killer sudoku at 5 difficulty levels, learn 40 solving techniques with diagrams and practice puzzles, and race other players in online 1v1 battles or take on the AI.

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🌟 KEY HIGHLIGHTS
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🧩 1. Classic and Killer, 5 Difficulty Levels
- Intro, Easy, Medium, Hard and Expert.
- Every puzzle is generated to have exactly one solution.
- Killer Sudoku: the digits in each dashed cage add up to the small number in its corner.
- Classic, Speedrun and Survival modes, for Standard and Killer alike.
- Ghost and Time Gap: replay your record puzzle against your own run, or see how far ahead of your best pace you are.
- 4 easy-on-the-eyes themes (Warm Clay, Matte Dark, Pure Ceramic, Classic Paper).

🎓 2. Academy: 40 Solving Techniques
- Each technique comes with an illustrated explanation and 2 practice puzzles on real boards.
- Beginner: Full House, Last Free Cell, Cross-Hatching, Naked Single, Hidden Single
- Intermediate: Pointing, Claiming, Naked/Hidden Pairs, Triples and Quads
- Advanced: X-Wing, XY-Wing, XYZ-Wing, W-Wing, BUG+1, Remote Pairs
- Master: Swordfish, Jellyfish, Unique Rectangles, Simple Coloring, 3D Medusa, XY-Chains, WXYZ-Wing, Empty Rectangles
- Grandmaster: Finned X-Wing/Swordfish, AIC, ALS-XZ, Forcing Chains, Junior Exocet
- Killer: Last Cell of a Cage, Unique Combination, Two-Cell Sums, Rule of 45, Must-Contain Digit, Hidden Cage, Innie-Outie Difference, Cage Splitting

⚔️ 3. 1v1 and AI Battles
- Real-time online battles: race another player on the same board.
- Watch your opponent's progress as you play.
- After a battle, replay it move by move.
- AI battles with 5 difficulty levels, on Standard or Killer puzzles.

🏆 4. Achievements and Play Analysis
- 40 achievements to unlock, also on Google Play Games.
- See your play broken down into 5 metrics, such as speed and mistake-free clears.
- Compete on the Logic Score leaderboard on Google Play Games.

📅 5. Daily Challenge
- A new mission every day, tracked on a calendar.
- Missed a day? Unlock past puzzles by watching a short ad.
- Earn a monthly badge.

☁️ 6. Cloud Backup
- When signed in to Google Play Games, your progress is backed up automatically.
- On a new device, you can load it back.

Take your time, think it through, and enjoy the puzzle.