Sudoku
Guide
English

Sudoku Guide for Beginners

Learn the rules in three minutes, then pick up the solving techniques one at a time. Every diagram comes from a real puzzle.

New to sudoku

Your First Sudoku

Learn the rules in three minutes, start a game and find your first number.

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New to sudoku

Your First SudokuLearn the rules in three minutes, start a game and find your first number.Controls and SettingsEntering numbers, notes, undo, hints and pausing, all on one page.

Solving techniques

Basic Techniques: SinglesHidden singles and naked singles. Easy and Medium puzzles need nothing else.Intermediate Techniques: Boxes and PairsWhen no single is left, remove impossible notes first. Hard puzzles use these four techniques.Advanced Techniques: Triples, X-Wing and the WingsThe six techniques for Expert and Evil, from triples to Swordfish and XYZ-Wing.

Rules and questions

Difficulty, Daily Challenge and StatsHow the five difficulties differ, how the daily challenge is scheduled, and how streaks and best times are counted.Frequently Asked QuestionsThe most common questions about puzzles, hints, saving and the display.