Sudoku How to play
Step-by-step guides to learning Sudoku and the techniques that solve it.
Guide
Cross-Hatching and Scanning: How to Spot the Next Number Fast
The scanning method expert solvers use to find placements in seconds, without pencil marks.
5 min readGuideNaked Singles vs Hidden Singles: The Two Techniques Every Solver Needs
The difference between a naked single and a hidden single — and how to spot both quickly.
5 min readGuideHow to Play Sudoku: A Beginner's Step-by-Step Guide
The only rule you need, a walk-through of your first solve, and the two techniques that finish most easy puzzles.
6 min read