Sudoku Guides
Everything on the site, from your first puzzle to Swordfish.
Start here
7 Sudoku Tips for BeginnersThe habits that get a first puzzle finished
How to Solve a Sudoku Puzzle, Step by StepOne real puzzle, solved start to finish
How to PlayThe two-minute interactive walkthrough
The RulesEvery rule on one page
Get better
What to Try When You’re StuckThe checks to run, easiest first
6 Common Sudoku MistakesAnd the habit that fixes each one
What Makes a Sudoku Puzzle Hard?How the four levels differ
Sudoku Techniques15 animated lessons, Full House to Swordfish
About sudoku
Sudoku GlossaryEvery term, shown on a board
Who Invented Sudoku?From 1890s Paris to 2004 London
Is Sudoku Math?No, and here’s why