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The Sudoku reference channel

Master
Sudoku
step by step
with Domino33

40 detailed techniques, dedicated software, and over 120 videos (with English subtitles) — to progress from beginner to expert at your own pace.

★★★★★ 4.8/5 · 56 verified Amazon reviews
▶ Subscribe for free View Domino33 publications
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120+
Videos
40
Techniques
120+
YouTube videos
100
Free puzzles
3
Books to progress
About Domino33

Want to master Sudoku
solving techniques?

You're in the right place!

Domino33 mascot

My Domino33 channel, with over 120 videos online, is fully dedicated to Sudoku. It's designed for both beginners and advanced solvers. 📺 All videos have English subtitles available — just enable them in the YouTube player.

You'll progressively learn and master Sudoku solving techniques with Sudoku Solver Pro, which lets you explore them both theoretically and practically. Its educational interface and powerful engine allow solving puzzles from level 5 to 12 and beyond.

It covers the following three categories of solving techniques:

📐 Basic techniques
Naked pairs, hidden pairs, naked triples, hidden triples, box reduction, pointing pairs
⚙️ Advanced techniques
X-Wing, SwordFish, Y-Wing, W-Wing, XYZ-Wing, WXYZ-Wing, XY-Chain, X-Cycles, Unique-Rectangle, Hidden-Rectangle…
🎯 Sophisticated techniques
Simple coloring, 3D-Medusa, APE, BUG, AIC…

You can also buy my book which brings all these techniques together, with the Sudoku Solver Pro software included.

▶
YouTube channel
Subscribe to Domino33
→
📘
On Amazon
View the memento
"40 Solving Techniques"
→
Solving methods

All techniques,
step by step

From naked pairs to 3D-Medusa coloring — progress without ever skipping steps.

01
Basic

Fundamental techniques

The essential building blocks to solve any grid up to intermediate level.

Naked pairsHidden pairs Naked triplesHidden triples Box ReductionPointing Pairs
02
Advanced

Advanced techniques

To tackle difficult grids (levels 7–10) with methodical and powerful tools.

X-WingSwordfish Y-WingW-Wing XYZ-WingXY-Chain X-CyclesUnique Rectangle
03
Expert

Sophisticated techniques

The masters' methods for the most complex grids — levels 11 and beyond.

Simple coloring3D-Medusa APEBUGAIC
📖
NEW ARTICLE

X-Wing Sudoku: the technique explained simply

Step-by-step tutorial with illustrated example and method to spot it in seconds. Beginner guide.

Read article →
📘 Publications

The Domino33 books

Two complementary books to learn and practice in the best conditions.

Sudoku – 40 Solving Techniques
★★★★★

Sudoku – 40 Solving Techniques

This Memento is for all Sudoku lovers, from beginners to experts, who want to improve their Sudoku solving skills. It provides, in the form of sheets, 40 solving techniques explaining how to solve the most complex puzzles up to the highest levels (9 and above). Companion videos available on YouTube with English subtitles.

🎁 FREE BONUS · Sudoku Solver Pro included
📘 Buy on Amazon →
Sudoku – 100 Puzzles
★★★★★

Sudoku – 100 Puzzles to solve and download

This book lets you put into practice all the techniques developed in the Memento, with progressive difficulty adapted to your level. 100 downloadable puzzles for Sudoku Solver Pro.

📥 Levels 5 to 9 · Downloadable puzzles
📘 Buy on Amazon →
📥 Free downloads

Free resources

Free supplements to go further with Sudoku Solver Pro.

🎁
Free

100 puzzles for Sudoku Solver Pro

Buying the book SUDOKU – The 6 Basic Techniques · 100 Exercises gives you access to 100 additional puzzles specially prepared to be solved with Sudoku Solver Pro (itself offered with the book SUDOKU – 40 Solving Techniques).

Compatible with versions 8.20 or 8.25 only. .rar format

📥 Download 100 puzzles →
📊
Free

Sudoku Filter Pro

Sudoku Filter Pro is a complementary software to Sudoku Solver Pro in the field of statistics. It uses all the data from the Sudoku database created by Solver Pro 8 to perform sorting, extraction and reporting operations particularly useful for learning and consolidating knowledge.

📥 Download Sudoku Filter Pro →
⚙️ Tools

Two software tools
to go further

Dedicated applications to study, solve and analyze all your puzzles.

⚙️

Sudoku Solver Pro

Solves all puzzles from level 5 to 12+. Particularly educational graphics. Applies the three families of techniques. Included with the book.

Get it via the book →
📊

Sudoku Filter Pro

Statistical complement to Solver Pro. Sorting, extraction and reporting from your solved-puzzle database. Free download.

Go to download →
🌟 Testimonials

What readers
are saying

Over 56 verified Amazon reviews with an average rating of 4.8/5 ★. Here are some testimonials:

★★★★★
Excellent tool to improve your Sudoku-solving approach. Access to Sudoku Solver is a real bonus and perfectly complements the very educational Domino33 YouTube channel.
— Karine
★★★★★
I'm thrilled with the content, and the included software is exactly what I needed to improve in Sudoku.
— Patrick
★★★★★
Domino33 is the reference! The channel explains techniques in a clear way. The book is a perfect companion and the solver is a gift for enthusiasts!
— Pascal
★★★★★
This book is a goldmine of the best Sudoku-solving methods found online. Very practical, clear, and comes with great software!
— jmdurand
★★★★★
I highly recommend the Domino33 YouTube channel. Its videos are a valuable complement to the techniques in the book. Excellent software!
— Edouard (Canada)

Reviews extracted from 56 Amazon comments left by passionate readers. Average rating: 4.8/5 ★★★★★

📌 YouTube channel

4 key videos to discover

Here are 4 key videos to get started on the Domino33 channel. English subtitles available — click the ⚙️ gear icon on any video and enable subtitles.

▶ Watch all 120+ videos on YouTube
❓ Frequently asked questions

Your questions,
our answers

Everything you need to know before getting started.

Is Sudoku Solver Pro really included with the book?
+
Yes, buying the book "SUDOKU – 40 Solving Techniques" gives you free access to Sudoku Solver Pro. Download instructions are included in the book.
What level is the book suitable for?
+
The book is for all Sudoku lovers, from beginners to experts. The 40 techniques are organized by progressive difficulty levels, so you can advance at your own pace.
What's the difference between Solver Pro and Filter Pro?
+
Solver Pro is an educational solving software that applies techniques to puzzles. Filter Pro is a statistical complement: it analyzes data from your solved-puzzle database to perform sorting and extraction useful for your learning.
Are all YouTube videos free?
+
Yes, all 120+ videos on the Domino33 channel are freely available on YouTube. Just subscribe to the channel to never miss a new release.
The videos are in French — is that a problem?
+
No, English subtitles are available on all videos! Simply click the ⚙️ gear icon on any YouTube video, select "Subtitles/CC", and choose English. The visual demonstrations of techniques are universal — numbers, grids, and color highlights work in any language.
How do I order the book?
+
The books are available directly on Amazon with Prime delivery. Just click the "Buy on Amazon" buttons above.

Ready to master
Sudoku?

Join thousands of enthusiasts on the Domino33 channel and start improving today.

▶ Subscribe on YouTube 📘 View the book on Amazon
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📚 Domino33 Blog

Sudoku Articles & Tutorials

Learn Sudoku techniques one by one with our detailed, illustrated and accessible guides.

🐟
Coming soon
Soon

Swordfish: the natural evolution of X-Wing

Discover the sibling technique of X-Wing, even more powerful, on 3 rows × 3 columns.

Coming soon
🎯
Coming soon
Soon

Hidden Pairs: the beginner's guide

The fundamental technique that unlocks dozens of cells. Step-by-step method and examples.

Coming soon
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