There are a lot of variants, here we uses the following rules.
1. Game of two players.
2. Show fingers. The number of open fingers are determined by random.
3. Drag and drop one of hands to other.
3. a. The number of fingers will be added with dropped fingers.
3. b. If the total becomes more than 6, minus 6.
4. Opponent's turn.
5. When both hands have no fingers opened, he/she loses.
6. When one of hands become no fingers opened, with other hands can share its fingers.
6. a. If the other hand has only one finger opened, it cannot share.
7. Cannot move hand if no finger opened.
