Sudoku Generator Sudoku Solver Daily Sudoku Killer Sudoku Generator Killer Sudoku Solver Super Sudoku Generator Super Sudoku Solver Samurai Generator Samurai Solver Godoku Solver Home News How To Play Sudoku Sign Up!Member Profile Competition The Sudoku Program Sudoku FAQ Newsletter Sudoku Books Sudoku Links Sudoku Syndication Contact Us

How to play

Sudoku

3×3 blocks

Complete the grid so that every row, column and every three-by-three box contains the digits 1 to 9. Solve the puzzle by logic and reasoning alone.

Animation on the three rules to complete a Sudoku with numbers 1 to 9

Simple techniques Advanced techniques Play Sudoku

Samurai Sudoku

5-grid, 3×3 Sudoku variant

Complete the Samurai grid so that within each of the five 9×9 Sudokus, every row, column and three-by-three box contains the digits 1 to 9. You will always need to solve the puzzle as a whole, you cannot just solve each Sudoku individually.

Play Samurai Sudoku

Super Sudoku

4×4 blocks

Complete the grid so that every row, column and every four-by-four box contains all the digits 0 to 9 and the letters A to F. Solve the puzzle by logic and reasoning alone.

Play Super Sudoku

Godoku

3×3 blocks with hidden words

Complete the grid so that every row, column and every three-by-three box contains the nine different letters. Solve the puzzle by logic and reasoning alone.

Solve Godoku

Killer Sudoku

3×3 blocks with sums as clues

Complete the grid so that every row, column and every three-by-three box contains the digits 1 to 9. Each "cage" (region outlined by a dashed line) has a cage total of all numbers within that cage. Numbers may not be repeated within a cage. Solve the puzzle by logic and reasoning alone.

Simple techniques

Multiple 45 rule

Multiple square 45 rule

Cage combinations

Play Killer Sudoku