Shanghai Mahjong Solitaire: A Fun Challenge
Shanghai is a popular mahjong solitaire game. The objective is simple: remove all matching tile pairs from the board.
To remove a pair, both tiles must be free on at least one side (left or right) and the top. Generally, tiles must match exactly.
However, there are two exceptions to this rule: You can match any two flower tiles, and any two season tiles, regardless of their specific design.