Choose from 75 different puzzles from easy to difficult. You can use a maximum of 3 hints per level. Use the arrow keys to switch between squares and type \"0\" (zero) to empty a square.
How to play sudoku games:
There is really only one rule to Sudoku: Fill in the game board so that the numbers 1 through 9 occur exactly once in each row, column, and 3x3 box. The numbers can appear in any order and diagonals are not considered. Your initial game board will consist of several numbers that are already placed. Those numbers cannot be changed. Your goal is to fill in the empty squares following the simple rule above.