Mahjong Solitaire 2014 app for iPhone and iPad

Mahjong solitaire is a solitaire matching game that uses a set of mahjong tiles rather than cards.
It is also known as Shanghai solitaire, electronic or computerized mahjong,
solitaire mahjong and erroneously as mahjong. The tiles come from the four-player game known as mahjong.
The tiles are arranged in a special four-layer pattern with their faces upwards. A tile is said to be open or exposed
if it can be moved either left or right without disturbing other tiles.
The goal is to match open pairs of identical tiles follow the standard order(+1 or -1) and remove them from the board,
exposing the tiles under them for play. The game is finished when all pairs of tiles have been removed from the board or
when there are no exposed pairs remaining.
Tiles that are below other tiles cannot be seen. But by repeated undos and/or restarts which some programs offer,
one gradually gets more and more information. Sometimes, tiles are only partially covered by other tiles,
and the extent to which such tiles can be distinguished depends on the actual tile set.
Playing Mahjong solitaire optimally in the sense to maximize the probability of removing all tiles.