Shanghai Mahjong Free Game. A free stone is not covered by another stone and at least one side (left or right) is open. The only thing that will make you lose is the inability to make a move, due to the presence of the last identical tiles one under another. Ad the best free games compared. Millions of people all over the world play in mahjong! All with the classic matching game play where you match identical pairs of free mahjong tiles. The Best Downloads For Any Device. Shanghai is the original mahjongg solitaire provided by sunsoft with various stages,...