Clube de Xadrez Scacorum Ludus: O antigo ofício de arbitrar xadrez

Viktor Korchnoi - Wikipedia

Karpov - Korchnoi 1978 World Championship Match - Chessentials

Viktor Korchnoi plays chess against Karpov. News Photo - Getty Images

Anatoly Karpov plays against rival Viktor Korchnoi in the World Chess News Photo - Getty Images

Campeonato Mundial de Xadrez de 1981 – Wikipédia, a enciclopédia livre

Viktor Korchnoi Quote: “The aim was simple: to deprive Karpov of his favourite occupation – standing at the board, staring straight at his oppon”

Tenth Interpolis Chess Tournament in Tilburg; A. Karpov (l) against V. Korchnoi (r), October 21, 1986, chess, tournaments, The Netherlands, 20th century press agency photo, news to remember, documentary, historic photography 1945-1990

Best chess players never to become World Champion - part one - Viktor Korchnoi - Chessentials

GK50 #44 - Karpov vs Korchnoi - O Massacre de Merano

Chess, Cheating and Yoghurt