Learn sudoku
Start here if you are new, or if a guide uses a word you do not know.
01How to solve sudokuA step-by-step method for beginners, from scanning to the first advanced techniques.
02Sudoku difficulty levelsWhat Easy, Medium, Hard, Unfair and Extreme mean, and what the number next to them is.
03Sudoku glossaryThe words you meet in sudoku guides: unit, peer, candidate, strong link, fish and more.
04Sudoku notationHow cells, boxes, eliminations and pencil marks are written in guides and in the solver.
When you are ready for the techniques themselves, see the technique guides, or open the solver and ask it for a hint.