from Sylvain Becker, originally released 8th November, 2012
This is a Mahjong game, a one-player game.
The goal is to clear the board by removing all the matching identical pairs from the layout.
A valid pair consists of two tiles which are both "free" and "identical" (or of the same type).
Recent posts about Mahjong (1bsyl)
discussion by Sidelines.