5 b6 instead of 5 bxa6 Dreev vs P Cramling, 2005  (A57) Benko Gambit, 50 moves, 1-0 quiet variation S Estremera Panos vs P Tregubov, 2005 (A57) Benko Gambit, 42 moves, 1/2-1/2 5 b6 Qxb6 instead of 5 bxa6 S Kasparov vs M Rachela, 2000 (A57) Benko Gambit, 33 moves, 1-0 4 Nf3 instead of 4 cxb5 Karpov vs Topalov, 2002  (A57) Benko Gambit, 31 moves, 1-0 4 games