Silver Star
SilverStar (Ginsei Igo) is the Japanese edition of North Korean program KCC Igo. Its is a commercial go playing program written for the Windows operating system.
KCC Igo was the Gifu Challenge winner from 2003 to 2006.
KCC Igo has been updated with Monte Carlo Tree Search. It won the 2009 UEC Cup, defeating Aya, Many Faces of Go, and Zen.
The earliest versions of KCC Igo and Hamlet which competed from 1997 through 2000 were accused of plagiarizing Prof. Chen Zhixing's program HandTalk. It is unknown whether subsequent versions continue to plagiarize, due to anti-tracing measures added to KCC Igo. This stigma extends to the present day; the largely rewritten KCC Igo was denied entry to the 2009 Computer Olympiad.