Round 1 Portisch vs Larsen, 1968  (E56) Nimzo-Indian, 4.e3, Main line with 7...Nc6, 41 moves, 1/2-1/2 Round 2 Larsen vs Portisch, 1968  (D59) Queen's Gambit Declined, Tartakower, 41 moves, 1-0 Round 3 Portisch vs Larsen, 1968  (E54) Nimzo-Indian, 4.e3, Gligoric System, 41 moves, 0-1 Round 4 Larsen vs Portisch, 1968  (D61) Queen's Gambit Declined, Orthodox, Rubinstein Attack, 39 moves, 0-1 Round 5 Portisch vs Larsen, 1968  (D47) Queen's Gambit Declined Semi-Slav, 34 moves, 1/2-1/2 Round 6 Larsen vs Portisch, 1968  (D59) Queen's Gambit Declined, Tartakower, 31 moves, 1/2-1/2 Round 7 Portisch vs Larsen, 1968 (E54) Nimzo-Indian, 4.e3, Gligoric System, 57 moves, 1-0 Round 8 Larsen vs Portisch, 1968  (C28) Vienna Game, 63 moves, 1/2-1/2 Round 9 Portisch vs Larsen, 1968  (D43) Queen's Gambit Declined Semi-Slav, 77 moves, 1/2-1/2 Round 10 Larsen vs Portisch, 1968  (C28) Vienna Game, 28 moves, 1-0 10 games