21. c5!! as set up by 19. Nxe6! is absolutely brilliant Kasparov vs Salov, 1989  (A15) English, 29 moves, 1-0 33...Rg1! Petursson vs Polugaevsky, 1987  (E15) Queen's Indian, 34 moves, 0-1 Nunn vs J A Sutton, 1984  (C11) French, 29 moves, 1-0 42...Qd1! Ivanchuk vs Adams, 1991  (C89) Ruy Lopez, Marshall, 42 moves, 0-1 44...Bf1! Ke1 45...Bc4! I Onat vs N Gavrilakis, 1984  (A40) Queen's Pawn Game, 48 moves, 1/2-1/2 24...Be5! Fitzgerald vs Sam Loyd, 1877  (C39) King's Gambit Accepted, 26 moves, 0-1 See mate-in-five (28. ?) puzzle in my May 29, 2006 post Shredder vs Rybka, 2006  (C45) Scotch Game, 53 moves, 1-0 35...Qe1! 36. Nxc6+ Ka8! -+ delays mate for two half moves Turov vs V Karagodin, 1997  (C01) French, Exchange, 36 moves, 0-1 8 games