In this ancient Chinese game you've to clear the board of stones without bringing down the whole pyramid!...

Instructions:

Mahjong is an ancient game that originated in China. It is a game of skill, intelligence, calculation and luck. The aim is to clear up the board of stones and not to bring down the whole pyramid! You can choose one of five pyramids to start with. They consist of 234, 164, 114, 64 and 40 stones. The quicker you clear the pyramid the more points you'll get. If you make a mistake you can press the "Back" button to undo the move. However, you can only undo one move at a time and you will loose the points you earned for that move. You've to remove the stones by finding matching pairs and Left Clicking on them but you can only remove those who have no stones on their left or right. Try to solve the puzzle completely and earn bonus points.