YT is the initials of "Keith". The initials of Lu and BF are winger, which stands for Keith. Lu Qiyuan and winger game halls are respectively. The former, Keith. Lu Qiyuan is an online chess game battle platform. At present, this website has become the most powerful professional chess and card game website in China. You can play with pure people inside, or you can play machine games with experts on Huashan Mountain. It is a place for chess lovers and top online players to learn martial arts and communicate with each other. The latter winger game is a leisure and entertainment game platform based on online chess and card games. Up to now, the winger's game website has launched 23 kinds of chess games, such as Go, Four Kingdoms, Double Buckle, Stud, Three Buckles One, Fast Running, China Chess, Atom, Flying Chess, Gobang, Upgrade, Red 5, Double Flying Chess, Black and White Chess and Finding Friends.

Search on Baidu and you will know. I haven't downloaded it. Don't forget to let me know if it's interesting! Forgive me for not answering well!