A clearer way to solve Sudoku.
Learn one useful idea at a time. Our free course takes you from your first puzzle to advanced techniques, with interactive examples you can try as you go.
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.
01 · FoundationsThe grid, the rules, and your first puzzle.
02 · BeginnerFoundation techniques for Easy puzzles
03 · IntermediateSubset techniques for Medium puzzles
04 · AdvancedPattern recognition for Hard puzzles
05 · ExpertChain logic for Expert and Evil puzzles
Reference Guides