Round 1 Bronstein vs Korchnoi, 1970 (D90) Grunfeld, 50 moves, 1/2-1/2 Round 2 Korchnoi vs Bronstein, 1970  (D33) Queen's Gambit Declined, Tarrasch, 52 moves, 1-0 Round 3 Bronstein vs Korchnoi, 1970  (A07) King's Indian Attack, 60 moves, 1-0 Round 4 Korchnoi vs Bronstein, 1970  (E60) King's Indian Defense, 35 moves, 1/2-1/2 Round 5 Bronstein vs Korchnoi, 1970  (A34) English, Symmetrical, 44 moves, 1-0 Round 6 Korchnoi vs Bronstein, 1970  (D47) Queen's Gambit Declined Semi-Slav, 30 moves, 0-1 6 games