Sudoku

Sudoku · Zen
All modes, all difficulties—one Sudoku game, mastered.

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Three Modes to Match Every Challenge

🎯 Classic Mode
The purest Sudoku experience. Easy allows 3 mistakes, Medium 2, Hard just 1. Limited forgiveness—every move counts. Fill the entire 9×9 grid to win.

⏱ Timed Challenge
Built for speed lovers. Easy: 10 min, Medium: 15 min, Hard: 20 min. Race against the clock—be fast and accurate. Time up or mistakes exhausted = failure. Watch a rewarded ad to gain +30 seconds for a last-minute comeback.

⚡ Extreme Mode
The ultimate test. Zero tolerance—one wrong cell ends the game instantly. No hints, no free undo, no safety net. Just you, the grid, and your skill.

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Three Difficulty Levels for Everyone
• Easy: 36 blanks, beginner-friendly, great for relaxing
• Medium: 46 blanks, balanced challenge requiring focus and logic
• Hard: 54 blanks, for experts—a true mental marathon

Each mode × difficulty tracks its own best time. Push your limits and beat your records.

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Carefully Crafted Controls

✏️ Pencil Notes
Not sure? Use notes to track candidates. Unlock advanced features via rewarded ads:
• Auto-fill candidates
• Smart note cleanup

🖐 Drag Input
Long-press a number and drag to fill quickly—smooth and efficient.

🔒 Number Lock
Hold a number to lock it, then tap cells to fill rapidly.

↩️ Undo Protection
Classic & Timed modes include free undo (Easy 3, Medium 2, Hard 1). More via ads.

💡 Hint System
1 free hint per game. Need more? Exchange ads for extra hints.

❤️ Second Chance
Out of mistakes? Watch an ad to gain +1 life and continue.

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Daily Check-In System

Complete one daily puzzle (random mode & difficulty):

🔥 Streak tracking
📅 Monthly calendar
🏆 Milestone rewards (3, 7, 14, 30 days; total 10, 30, 50)

Make Sudoku your daily brain ritual.

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Achievement System

Over 30 achievements across five categories:
• Beginner
• Classic Mode
• Timed Challenge
• Extreme Mode
• Daily Check-In

Unlock achievements to get satisfying on-screen rewards.

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Clean & Elegant Design
• Smooth fade + slide animations
• Mode colors: Classic (blue), Timed (orange), Extreme (red)
• Difficulty colors: blue / orange / red
• Supports Simplified Chinese, Traditional Chinese, and English

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Free to Play

Completely free. Ads are optional and reward-based—no interruptions.

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Start now—awaken your logic with a single Sudoku game.