Welcome to COSUMI! On this site, you can play 5×5 to 19×19 Go (a.k.a. Igo, Baduk, and Weiqi), which is a well-known ancient board game. If you do not know. go multiplayer game. log in guest. username, password. (?) · sign up for free. facebook go multiplayer game, % free. baduk game, weiqi online. go. Other Go Resources · Support OGS · Turn off ads and better support OGS, become a site supporter today! 0 live games 0 correspondence games. Refresh. / 1.