This is a simple, easy-to-play mahjong software.
It's a two-player mahjong game, 1-on-1 against a computer versus a human.
Pon and Chi are allowed, but Kan is not. There is no Ura Dora either.
The following yaku can be determined: Seven Pairs, Ji Isshiki, Dai San Gen, Shi Ki Wa, Qing Lao Tou, Shi Anan Koku, Tai-Wa, San Anan
Koku, Mixed Lao Tou, Dan Yao Nine, Pure Zen-Tai Yao, Zen-Tai Yao, Qing Isshiki, Mixed Isshiki, Small San Gen, Heiwa, Ippai Kou, Iki Tsutsukan, Sanshoku Dojun, Sanshoku Tongkoku, Kokushi Musou, Fan Pai, and Fu.