Links
The Ultimate Sudoku Resource Directory
We’ve compiled the most comprehensive directory of Sudoku resources on the web. Whether you’re looking for puzzles, learning materials, communities, or competitions, you’ll find the best of what the Sudoku world has to offer.
🎮 Major Sudoku Websites
Sudoku.com
The world’s most popular free online Sudoku site with billions of puzzles from Easy to Expert, daily challenges, seasonal events, and powerful solver tools.
Web Sudoku
One of the longest-running Sudoku websites offering billions of free puzzles with a simple, clean interface.
SudokuWiki.org
Comprehensive strategies for Sudoku, Sudoku X, Killer Sudoku, and Jigsaw Sudoku with detailed solving techniques and explanations.
Sudoku9x9.com
Unique online solver that not only provides solutions instantly but explains the techniques and logic behind each step.
Daily Sudoku
Daily puzzles with active forums for discussion, solving tips, and community engagement.
Puzzle Baron Sudoku
More than 50,000 different puzzles ranging from very easy to fiendishly difficult.
📚 Educational Resources
Sudoku.com Rules & Strategies
Step-by-step tutorials from beginner strategies to advanced methods like X-Wing and Swordfish.
Learn-Sudoku.com
Detailed steps to master any Sudoku with basic and advanced techniques clearly explained.
SudokuOnline.io Tips
Features both beginner strategies and advanced Sudoku techniques with clear examples.
Mastering Sudoku
Comprehensive resource for Sudoku tips, tricks, and solving techniques.
Conceptis Sudoku Techniques
Professional-grade Sudoku solving techniques from a major puzzle publisher.
Sudopedia
Free Sudoku reference guide with alphabetic list of terms, definitions, and solving strategies.
💬 Communities & Forums
The New Sudoku Players’ Forum
One of the most active communities with over 70,000 postings. Excellent discussions on advanced techniques.
r/sudoku
Active Reddit community with 35,000+ members offering puzzle sharing, solving help, and strategy discussions.
r/puzzles
Huge subreddit with 427,000+ members covering all puzzle types with rich Sudoku content.
Daily Sudoku Forums
Discuss puzzles, puzzle types, solving tips, and explanations with fellow enthusiasts.
📱 Social Media
YouTube Channels
Cracking The Cryptic
The world’s biggest Sudoku YouTube channel with 666K+ subscribers. Hosted by Mark Goodliffe and Simon Anthony. Famous for “Miracle Sudoku” with nearly 10 million views.
BremSter Puzzles
5.5K+ subscribers solving innovative Sudoku puzzles with clear explanations.
@sudoku.easybrain
Official Sudoku.com account with 98K+ followers posting daily puzzles, tips, and challenges.
Twitter/X
@CrackingTheCryptic
17.6K+ followers. One of the most influential Sudoku voices online.
@sudoku_com
Official Sudoku.com account sharing puzzles and updates.
Sudoku.com
162,000+ likes with active community engagement.
Daily Sudoku
19,000+ likes featuring daily puzzles and community discussions.
📲 Mobile Apps
Sudoku.com by Easybrain
Most downloaded Sudoku app with 10,000+ puzzles across six difficulty levels, daily challenges, and auto-notes.
Download on iOS |
Download on Android
Brainium Studios Sudoku
Features dark mode, unlimited undo/redo, multiple themes, and five difficulty levels.
Download on iOS |
Download on Android
Andoku Sudoku 3
Popular Android app with nine difficulty settings plus four game modes including color Sudoku.
Download on Android
NYT Games: Word Games & Sudoku
Official New York Times app featuring Sudoku alongside Wordle, Crossword, and other games.
Download on iOS |
Download on Android
SudokuPad
Used by Cracking the Cryptic in their videos. Supports puzzle solving and creation with import functionality.
Download on iOS |
Download on Android |
Web Version |
Steam
🏆 Competitive Sudoku
World Puzzle Federation
Organizes the World Sudoku Championship (WSC), held annually since 2006.
WSPC 2025
Official site for 2025 World Sudoku and Puzzle Championships in Eger, Hungary.
US Puzzle and Sudoku Championships
Official US national championships for puzzle and Sudoku competitions.
Logic Masters India
Conducts national Sudoku championships since 2008 and selects Indian teams for world championships.
🎨 Sudoku Variants
Samurai-Sudoku.com
Features Samurai puzzles with one unique solution solvable through pure logic.
Sudoku.com Killer
Killer Sudoku puzzles with cages that make up specific sums, from easy to expert.
Daily Killer Sudoku
Dedicated site for daily Killer Sudoku puzzles.
F-Puzzles
Sudoku setter tool used by the puzzle-creating community for variant Sudoku puzzles.
📰 Publishers & Print
Nikoli Publishing
The original Japanese publisher that popularized Sudoku worldwide. Only company that still crafts puzzles by hand.
Penny Publications
Publishes 85+ puzzle magazine titles with 60+ different puzzle books distributed throughout North America.
Puzzler Magazines
UK-based publisher offering range of Sudoku magazines from mild to fiendish difficulty.
The New York Times
Prints daily Sudoku puzzles in newspaper and offers 10,000+ puzzles in NYT Games app.
The Times (UK)
Launched Sudoku November 12, 2004, instrumental in popularizing the puzzle worldwide.
🛠️ Software & Tools
HoDoKu
Free Java-based Sudoku generator/solver/trainer/analyzer. Great learning tool with step highlighting.
SudoCue
Freeware Sudoku generator, helper and solver for Windows. One of the most powerful Sudoku solvers available.
SudokuPad
Web app by Sven Neumann used by Cracking the Cryptic. Create and solve puzzles with import/export functionality.
Sudoku Coach
Teaches how to solve difficult Sudoku using 54+ strategies with step-by-step graphics.
✨ Specialty Resources
Artisanal Sudoku
Substack by James Sinclair delivering hand-crafted variant Sudoku puzzles.
Conceptis Puzzles
Game publisher creating 25,000+ new logic puzzles yearly. Offers classic Sudoku and variants.
Sudoku Station
Resource site for Sudoku enthusiasts with guides to online forums, groups, and communities.
This directory is regularly updated to ensure all links remain active and relevant. Know of an excellent Sudoku resource we’re missing? Contact us to suggest an addition.