Petrosian vs Ivkov, 1974  (E41) Nimzo-Indian, 41 moves, 1-0 Knaak vs Vaganian, 1980 (E41) Nimzo-Indian, 40 moves, 0-1 pg 142 A Yusupov vs B Lalic, 1996 (E41) Nimzo-Indian, 43 moves, 1-0 pg 147 Dreev vs Short, 2004 (E34) Nimzo-Indian, Classical, Noa Variation, 36 moves, 1/2-1/2 4 games