ADDOKU is a logic puzzle, a variation of Sudoku. Not only must you have the numbers 1 to 9 in each row and column with no repeats, numbers in pair and triplet boxes must add to the total in top left corner of the box. The game comes in two sizes. ADDOKU-7 is a smaller version to get you started. ADDOKU-9 is the full-size puzzle. Each game comes with a Hint message if you get stuck.
Take a quick look at the interactive Tips for Playing page to see how to get started with ADDOKU.
Youll never go back to ordinary Sudoku!