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The Chunlan Cup (Simplified Chinese: 春兰杯; literally "Spring Orchid Cup") is a relatively new world go championship that began in 1998. The Chunlan cup is the only international tournament in which games are played according to Chinese rules, and is also the only international tournament sponsored by a Chinese company (the Chunlan Group).
In the cup, twenty-four players are invited to compete in a knockout tournament, with eight players being seeded into the second round. The final is then a best of three match, with a winner's prize of $150,000. Time limits are 3 hours main time with 5 periods of 1 minute byoyomi.
|1st||Dec 1998 - Jun 1999||Cho Hun-hyeon||Yi Ch'ang-ho||2-1|
|2nd||Dec 1999 - Jun 2000||O Rissei||Ma Xiaochun||2-1|
|3rd||Dec 2000 - Jun 2001||Yu Ch'ang-hyeok||O Rissei||2-1|
|4th||May 2002 - Mar 2003||Yi Ch'ang-ho||Hane Naoki||2-0|
|5th||Dec 2003 - Mar 2005||Yi Ch'ang-ho||Zhou Heyang||2-1|
|6th||Dec 2006 - Mar 2007||Gu Li||Chang Hao||2-0|
|7th||Mar 2008 - Jun 2009||Chang Hao||Yi Ch'ang-ho||2-0|
|8th||Mar 2010 - Jun 2011||Lee Sedol||Xie He||2-1|
|9th||Mar 2012 - Jun 2013||Chen Yaoye||Lee Sedol||2-1|
|10th||Mar 2014 - Jun 2015||Gu Li||Zhou Ruiyang||2-0|
|11th||Mar 2016 - Jun 2017||Tan Xiao||Park Yeonghun||2-1|
|12th||Mar 2018 - Jun 2019||Park Junghwan||Park Yeonghun||2-0|
|13th||Jul 2020 - Sep 2021||Shin Jinseo||Tang Weixing||2-0|
The 3rd Chunlan Cup was the scene of the infamous incident where Kobayashi Satoru injured Ryu Shikun during a drinking session in Taizhou, China. The Nihon Ki-in moved swiftly and suspended Kobayashi Satoru from all professional go activities for one year. That suspension was later commuted to eight months, and he was allowed to return to active play in September 2001.
There was an initial effort on Sensei's Library to give detailed commentary on the games of the Sixth Chunlan Cup. This project has now been abandoned.