How to Solve Sudoku: A Complete Course
Go from absolute beginner to advanced solver with our free interactive course. Five levels and 30+ lessons cover every technique you will ever need — from the fundamentals through to XY-Chains. Each lesson includes a plain-English explanation, step-by-step guide, common mistakes to avoid, and an interactive example so you can practice right on the page.
All Lessons
Each level builds on the one before it. Follow them in order for the best experience, or jump straight to any lesson you need.
Reference Guides