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SudokuWorldTournament

SudokuWT.com โ€ข Monthly & weekly tournaments โ€ข Daily leaderboard โ€ข Challenges

About Admin
Naked Single
Score 0 Perfect play! +2,500

Best free Sudoku app for iPhone & iPadSolved by logic.
Scored by skill.

Every board has one purely logical path โ€” no guessing. Our engine recognises the human technique behind each move and rewards the hard ones. Watch it solve, score, and celebrate.

Download on the App Store How it works โ†’
A few of the 50+ player avatars cycling
50+ avatars

What's NEW in v2.5.6 v2.5.6

  • Faster, smoother game board
  • Play ad-free: 2 credits buy a round without ads
  • Invitations to friends in your language
  • Improved stability in the purchase flow
  • Replay of top players' rounds fixed
  • Bug fixes
Read the full User Guide โ†’

Genuine Sudoku solving techniques โ€“ in every puzzle

Every puzzle is generated and graded by an engine that solves like a human expert: no guessing, no brute force. The app recognises 15+ techniques as you play, scores each move by its difficulty and shows you the next logical step when you ask for a hint. Learn them here:

All technique tutorials โ†’

The Ultimate Competitive Sudoku Experience

SudokuWorldTournament is not just another puzzle app; it is a competitive arena built on a deep understanding of human logic.

Unlike generic generators that rely on brute-force randomisation, our engine constructs every board using authentic human solving techniques. By reverse-engineering strategies like Hidden Subsets, X-Wings, and Swordfish, we ensure that every puzzle has a strictly logical deductive path. This guarantees a premium experience: zero guessing, pure flow, and challenges designed to match the way the human brain actually thinks.

Key Features

1. Global Monthly Tournaments

Compete against players worldwide in structured monthly seasons. The live Top 20 leaderboard displayed on this site updates every 10 minutes, showing real-time global standings.

2. Advanced Scoring System

Our sophisticated algorithm awards points based on 15+ specific solving techniques (e.g., Naked Singles, Hidden Pairs, X-Wing, Swordfish). The harder the technique, the higher the score awarded.

3. Real-Time Technique Recognition

The app automatically recognises the logic behind your moves as you make them, celebrating advanced plays with visual feedback. It's the best way to learn while you play.

4. Direct Challenge System

Send head-to-head challenges to friends via shareable deep links. You both ensure a perfectly fair comparison by playing the exact same puzzle seed.

5. Privacy-First Design

No personal information is required. Leaderboards are anonymous using score_id hashing. Full GDPR compliance with opt-in consent.

6. Intelligent Hint System

Smart hints don't just give the answer; they show "witness cells" and explain the underlying logic. Perfect for learning without ruining the challenge.

7. Offline-First Architecture

Play anywhere without internet. Scores sync automatically when you come back online. A local puzzle pool ensures you always have a game ready.

8. Optimised for iOS & iPadOS

Beautiful SwiftUI design tailored specifically for both iPhone and iPad. Adaptive layouts and scalable HUDs ensure a perfect experience on any screen size.

9. Performance & Polish

Lightning-fast puzzle generation (<100ms). Smooth animations, full undo/redo with score tracking, and fun Easter eggs for perfect play.

10. Fair Play Enforcement

Our anti-guessing system penalises random attempts and tracks mistakes. Only legitimate logical deductions are rewarded, ensuring a level playing field for everyone.

11. Daily Challenge

A new puzzle every day, identical for all players worldwide. Complete it to earn a streak badge (๐Ÿ”ฅ 3+ days, โšก 7+ days, ๐Ÿ‘‘ 28+ days) and compete on the daily leaderboard.

12. Tribes โ€” Compete Together

Create and join your own tribes. Build private high-score leaderboards for your company, sports club, association, or group of friends โ€” compare and compete internally, then take on every other tribe as a team. Discover open tribes for your organisation, university, or sports club, and track weekly leaderboards across all difficulty levels.

13. Professor Difficulty

The ultimate challenge for Sudoku masters. Professor puzzles require XYZ-Wing, Remote Pairs, and advanced chain techniques. Unlock it by building a 28-day Daily Challenge streak.

14. Premium & Gaming Credits

Go Premium with a one-time purchase to remove all ads permanently. Or earn Gaming Credits by watching ads to play ad-free sessions. No subscriptions, no hidden costs.

15. Scan and Solve (Beta)

Scan any Sudoku puzzle from a newspaper, book, or magazine using your camera, and watch it solved step by step with real technique labels. A powerful learning tool โ€” no scoring.

16. Weekly Recap

Review your weekly performance with detailed stats: puzzles completed, average time, techniques used, tribe rankings, and personal bests โ€” all in one summary.

17. Invite Friends

Share referral links to invite friends to download SudokuWorldTournament and grow the community. Separate from tribe invites โ€” spread the word easily.

18. Autoplay / Technique Showcase

Watch the AI solve puzzles using authentic human techniques. Each step is displayed with the technique name and explanation โ€” the ultimate way to learn advanced strategies.