pg 12 Move 20: Botvinnik vs N Sorokin, 1931  (D60) Queen's Gambit Declined, Orthodox Defense, 55 moves, 1-0 pg 13 move ....17 Bronstein vs Petrosian, 1956  (E95) King's Indian, Orthodox, 7...Nbd7, 8.Re1, 29 moves, 1/2-1/2 pg 13 move 17 exer cise 11 Ivanchuk vs Aronian, 2007  (D38) Queen's Gambit Declined, Ragozin Variation, 49 moves, 1-0 pg 14 game move 27 exercise 12 Fischer vs Spassky, 1992  (C95) Ruy Lopez, Closed, Breyer, 50 moves, 1-0 4 games