The Sudoku Collection contains free printable Sudoku puzzles with various levels

of difficulty from beginner to expert plus Big Sudoku and Giant Sudoku puzzles.

There are also Online puzzles, a Daily Sudoku and Sudoku puzzles for Kids.

The rules of Sudoku are simple. Place a digit from 1 to 9 in each empty cell so

every row, every column and every 3x3 box contains all the digits 1 to 9.