The rules of Sudoku are simple. Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must each 3x3 square. Each Sudoku has a unique solution that can be reached logically without guessing.

Level 1 | Level 2 | Level 3 | Level 4 | Level 5 Play Sudoku also online.

Sudoku Books

You can find more Sudoku Books at Puzzle Master Inc.

Sudoku Variants

We have also a list of Sudoku variants including a short description and links to website where you can play these Sudoku variants online.