SudokuGG Guides
Start here
Learn the rules, choose the right difficulty and build a repeatable solving routine. These guides support the playable Classic Sudoku, Printable Sudoku and Kalkudoku modules with clear, practical explanations.
Guide pages
Free Sudoku online
Start a browser puzzle without an account.
Play Sudoku online
Understand the controls, notes and hints.
Sudoku rules
Learn the row, column and 3×3 box rules.
Sudoku for beginners
Begin with singles and calm scanning.
Solving tips
Improve accuracy before working on speed.
Difficulty levels
Compare Easy, Medium, Hard and Expert.
Printable Sudoku guide
Create A4 sheets with optional solutions.
Kalkudoku rules
Understand cages and arithmetic clues.
SudokuGG overview
A factual summary of the collection.