Now if your chance to enhance your Sudoku skills or learn how to play Sudoku in the first place! This game has 6 different variants and these include, classic, diagonal, irregular, odd even, chain and multi. Each of the puzzles is solved like a regular Sudoku puzzle you would find in your newspaper but each of them had an additional twist according to the variant rules. You have to click the mouse on the desired square to open the dial pad and then you click on the desired number. You can remove a number by using the X at the bottom of the dial pad.