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 how to play Go, please look at Wikipedia(Rules of go) first, and then try a 5×5 game that is just right for a beginner like you. Enjoy!

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