Aronian vs Carlsen, 2011  (D55) Queen's Gambit Declined, 50 moves, 1/2-1/2 By Heart : Openings & Middlegame Strategy. Petrosian vs Spassky, 1969  (D55) Queen's Gambit Declined, 50 moves, 1-0 By Heart : Openings & Middlegame Strategy . Kasparov vs Karpov, 1986  (D55) Queen's Gambit Declined, 46 moves, 1-0 3 games