A pawn sacrifice for piece activity in R+N v. R+N. Petrosian vs Portisch, 1974  (D30) Queen's Gambit Declined, 40 moves, 1-0 A classic Andersson king invasion. Andersson vs M J Tempone, 1979  (A15) English, 31 moves, 1-0 Andersson vs Robatsch, 1979  (A15) English, 33 moves, 1-0 Petrosian continually transforms the nature of his advantage. Petrosian vs Botvinnik, 1963  (D94) Grunfeld, 48 moves, 1-0 Rubinstein vs Schlechter, 1912  (D41) Queen's Gambit Declined, Semi-Tarrasch, 39 moves, 1-0 Alekhine vs Yates, 1922   (D63) Queen's Gambit Declined, Orthodox Defense, 38 moves, 1-0 C Li vs Z Peng, 2010  (C18) French, Winawer, 41 moves, 1-0 7 games