A1: Three Knights Variation Kasparov vs Karpov, 1985  (E21) Nimzo-Indian, Three Knights, 42 moves, 1-0 A2: Three Knights Variation Kasparov vs Karpov, 1986  (E21) Nimzo-Indian, Three Knights, 41 moves, 1-0 A2: Romanishin Variation. English Hybrid Kasparov vs G Miralles, 1988  (E20) Nimzo-Indian, 50 moves, 1-0 A3: Romanishin Variation. English Hybrid Kasparov vs Anand, 1999  (E20) Nimzo-Indian, 33 moves, 1-0 A3: Romanishin Variation. English Hybrid Kasparov vs Short, 1999  (E20) Nimzo-Indian, 40 moves, 1-0 B: Three Knights Variation Kasparov vs Karpov, 1985  (E21) Nimzo-Indian, Three Knights, 25 moves, 1-0 C: Three Knights Variation Kasparov vs Karpov, 1985  (E21) Nimzo-Indian, Three Knights, 42 moves, 1-0 7 games