Stakhanovite

Before leaving the topic of the 50th anniversary of the 1967 tournament to mark the half-century of the Russian revolution, I must mention the Hungarian grandmaster Lajos Portisch, another hero of that prestigious competition. (Leonid Stein being the overall winner.) Portisch was famed for his immense hard work and profound erudition in the openings. At Moscow he outgunned both the reigning world champion, Tigran Petrosian, and his recent challenger, the future champion Boris Spassky, as a result of his Stakhanovite exertions in the field of openings analysis.
 
Portisch-Spassky: October Revolution, Moscow 1967, Nimzo-Indian Defence
 
1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 b6 5 Nge2 Ba6 6 Ng3 0-0 7 e4 Nc6 8 Bd3 d5 This move is not seen any more, 8 … e5 being preferred. 9 cxd5 Bxd3 10 Qxd3 exd5 11 e5 Ne4 12 a3 Bxc3+ 13 bxc3 f5 14 Ne2 Played with the aim of rerouting the knight to a more active square, f4.