The KGS Go Server, known until 2006 as the Kiseido Go Server, is a game server first developed in 1999 and established in 2000 for people to play Go. The system was developed by William M. Shubert and its code is now written entirely in Java. In Spring of 2017, Shubert transferred ownership to the American Go Foundation. A list of the top 100 players, sorted by KGS calculated rank, is regularly updated and maintained. International tournament games and national championship games are relayed on this server. Monthly Computer Go tournaments are held in the Computer Go room on KGS.