go multiplayer game. go online free. log in guest. username, password. (?) · sign up for free go multiplayer game, % free. baduk game, weiqi online. go. 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. There are two common ways in which you can use a computer to play Go with other people over the Internet - real-time and correspondence.