61 Rb6-f6+! attacks Black f7-king defender of loose g6-bishop Adams vs D Andreikin, 2013  (C67) Ruy Lopez, 64 moves, 1-0 31 e2-e3?? leaves behind f3-bishop, remove guard 31 .. h4-h3+! G Meier vs Kramnik, 2013  (E06) Catalan, Closed, 5.Nf3, 38 moves, 0-1 2 games