All games
›
Sudoku
› Guides
Sudoku guides
Everything you need to go from your first 4×4 grid to a hard 9×9 puzzle.
How to play Sudoku
The three rules, the first moves, and how to use notes.
Sudoku strategies
From the last free square to pairs, pointing and X-Wing.
Sudoku for kids
Which grid for which age, and how to teach it.
4×4 Sudoku
The first Sudoku for young kids, with answers.
6×6 Sudoku
The step between 4×4 and the full 9×9 grid.
Printable Sudoku
Free PDF sheets with answers, every level.
Play today's Sudoku
Easy, Medium, Hard and two kids' grids. Free, no sign-up.