Shanghai and its sequels are ''Szechuan''-style solitaire mahjong games where the object is to match identical pairs of tiles until the board is clear or you are unable to make another move. This type of solitaire mahjong can also be referred to as ''Shanghai'', hence the game title. The stacked-tile arrangement presented here is one of many traditional Chinese ''Szechuan''-style solitaire mahjong arrangements.