Learn sudoku, properly.
Most sudoku “guides” on the internet are thin rewrites of the same Wikipedia paragraph. These aren’t. We’ve written long-form, illustrated guides to the rules, the techniques, the variants, and the actual cognitive science of the puzzle, the way we wish someone had explained it when we started playing.
Free to read, no sign-up. If you want to apply what you learn, play sudoku free in your browser.
Fundamentals
Start here. The rules, the board, and the first habits to build.
- Fundamentals9 min
How to Play Sudoku: A Complete Beginner's Guide
The rules, the board, and a step-by-step walkthrough so you can solve your first puzzle today.
Read → - Fundamentals7 min
The Rules of Sudoku, Explained Properly
The one rule, the three constraints, the common misconceptions, and the rules of every major variant.
Read → - Fundamentals8 min
12 Sudoku Tips for Beginners (That Actually Help)
How to scan, when to use pencil marks, and the beginner mistakes that quietly waste an hour of your life.
Read →
Techniques
Logical solving methods, from naked singles up to X-Wings.
Variants
Beyond the classic 9x9 grid.
Background
Where sudoku came from and what it actually does to your brain.
- Background11 min
The Surprising History of Sudoku, From Latin Squares to Tokyo
From Euler's Latin squares to Howard Garns, Nikoli, and the 2004 newspaper craze that conquered the world.
Read → - Background10 min
The Benefits of Sudoku: What the Science Actually Says
What the research really says about sudoku and the brain, separated from the marketing claims.
Read →
Ready to play?
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