This is a famous incidence : Interzonal Tournament, Goteborg (Sweden), 1955. Three Argentinian grandmasters (Miguel Najdorf, Herman Pilnik and Oscar Panno) were playing Black against three Russian grandmasters (Paul Keres, Boris Spassky and a third Russian grandmaster). The Argentinians had prepared a novelty in the opening and all of them used the same idea on their Russian opponents. While the Russians were analyzing the best line of play, Najdorf walked up to the third Russian grandmaster and said "You’ve got a lost game – we’ve analyzed it all!". The Russian, unperturbed, played his next move and it was something the Argentinians had not anticipated. Seeing his response, the other two Russians (Spassky and Keres) also followed suit with the same move, and it eventually led to a 3-0 defeat of the grandmasters from Argentina who had "analyzed it all". Who was the third Russian grandmaster, the chief architect of the Argentinian Tragedy, who was later to be a coach to World Champions Boris Spassky and Anatoly Karpov ?