nikaku app for iPhone and iPad
nikaku is a traditional puzzle game using mahjong tiles. this is known as Nikakudori or Sichuan. You can remove one pair of two tiles that have no other tiles between them and can be connected within 2 corners of each other. You win the game if you clear all the tiles. But it is game over if you cant remove any more pairs. You can give up the game by touch-and-hold.