Mahjong 15

Matching Tiles are selected and removed. A total of 144 need to be removed to win. There are 36 patterns with four tiles each pattern. All tiles with a match are hi-lighted until one is selected. At that point, only tiles matching the selected are hi-lighted. The matching pair is removed by a second selection of a matching tile. Undo is unlimited for retries with more than one matching tiles.

Three levels of difficulty:
Very Hard -- All tiles must match,
Not So Hard -- Any Flower match,
Easier -- Any flower and all seasons.

Tiles left and matches remaining are indicated. Games played and percentages are tracked.