Viktor Korchnoi with the black pieces [X]

move	games	white wins - draws - black wins %
1. e4	940	20.5% 44.1% 35.3%
1. d4	788	20.2% 46.1% 33.8%
1. Nf3	225	18.7% 48.9% 32.4%
1. c4	171	22.8% 49.1% 28.1%
1. g3	13	15.4 38.5% 46.2%
1. b4	Johann Sander vs Korchnoi, 1985 0-1
1. Nc3	V Smith vs Korchnoi, 1993 0-1
1. c3	I Rogers vs Korchnoi, 1982 0-1