In Mahjong Solitaire you must combine 2 of the same mahjong stones to remove them from the playing field. You only can use free stones. A free stone is not covered by another stone and at least 1 side (left or right) is open. Triple Mahjong is similar to Mahjong Solitaire with the exception you must match 3 stones at a time. Mahjong Connect allows you to remove any adjacent stones, or to remove any stones which can be connected with a vertical or horizontal line that is straight or turns at 90 degrees no more than twice.
