Shanghai Mahjong - Double Tiles

In Shanghai, ancient historical sites meet modern skyscrapers and an impressive skyline. There are many indications that traditional Chinese mahjong originated in the Shanghai region. Whether this is true or not, Shanghai Mahjong is an ideal way to pass the time. Place all the tiles in groups of 3 or 4 identical or 3 or 4 consecutive cards in the lower boxes and gradually clear the playing field.