KAKURO:
1. There are 6*8, 7*7, 8*8, and 9*9 levels. Four levels of difficulty. Each level contains a million puzzles.
2. Auto indication for wrong answer. The screen flickers when the wrong answer or a self-contradiction number is placed.
3. Help function. This can show the correct answer in the place where the cursor lays.
4. Formula indication. When the cursor appears at the base of the generative number, it will indicate the combinative numbers according to the current numbers and the number of blank spaces.
5.Game storage and transfer function. Kakuro can store 9 groups of games.