35 e4-e5! sacs a pawn so White c3-knight can use e4-square Lasker vs Capablanca, 1914  (C68) Ruy Lopez, Exchange, 42 moves, 1-0 24 d4-d5! sacs a pawn to vacate d4-square for White e2-knight Carlsen vs Ivanchuk, 2007  (D86) Grunfeld, Exchange, 35 moves, 1-0 Kasparov vs Kramnik, 2000  (C78) Ruy Lopez, 41 moves, 1/2-1/2 3 games