Steinitz - Mongredien, London, 1863

1.e4 g6 2.d4 Bg7 3.c3 b6 4.Be3 Bb7 5.Nd2 d6 6.Ngf3 e5 7.dxe5! A profilactical move. Now the white has a solid center and his king can remain at center 7...dxe5 8.Bc4 Ne7 9.Qe2 0-0 10.h4! Nd7 11.h5 c5 12.hxg6 Nxg6 [12...hxg6 13.Ng5 -- 14.0-0-0?] 13.0-0-0 a6 right idea, but too slow to be practical. Black would close the diagonal a2-g8 14.Ng5 Nf6 [14...h6 15.Nxf7 Rxf7 16.Qg4!] 15.Nxh7! Nxh7 16.Rxh7 [16.Qh5! Nf6 17.Qxg6 Qc8 18.Rh7!! Nxh7 19.Bh6] 16...Kxh7 [16...b5 it doesn't work 17.Qh5! bxc4 18.Rxg7+ Kxg7 19.Qh6+ Kg8 20.Rh1 Re8 21.Bxc5 Re7 22.Nxc4?] 17.Qh5+ Kg8 18.Rh1 Re8 19.Qxg6 Qf6 20.Bxf7+! Qxf7 [20...Kf8 21.Bxe8 Rxe8 22.Rh8+ Bxh8 23.Bh6+] 21.Rh8+ Kxh8 22.Qxf7 1-0