iShanghai is the iPhone web application adaptation of the classic game of solitaire using MahJongg tiles, originally created by Brodie Lockard in 1981.
The goal of the game is to clear the board by tapping on pairs of identical tiles that would be free to slide to the right or the left.
There are four of each tile in the game, except for the special "seasons" and "flowers" sets. Each of these special sets has four unique tiles. Any one of the "seasons" or "flowers" tiles will match any other one in its set.