A brief comment on Conquistador's post about
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.d4 d5 6.Bxd5 Nxd4 7.Nxf7?! Qe7 8.Nxh8 Bg4 Now critical is
9.Qd2 Nxd5 10.exd5 (10.c3
0-0-0!? - instead of 10...Nf6 - 11.ed Rxd5 12.dc? ed+ -+, or 12.b4 Bxb4 13.cb Qxb4! 14.0-0 Ne2+ -+, or 12.h3 Qh4 13.cd Rxd4 -+) 10...Bf5 11.0-0 (11.d6!?) Nxc2 12.g4?! (12.Qe2) Qh4 and instead of 13.Qg5 White can force a draw with 13.fg Qg4+ 14.Kh1 Qf3+ =. The only winning attempt here is 12...Nd4 13.Kg2 Bxg4 14.f3 Bxf3 15.Rxf3 Nxf3 16.Kxf3 0-0-0, but it is unclear.
9.Bf7+ Kf8 10.f3? Nxe4 11.fxg4 Qh4+ 12.g3 Nxg3 13.Bg5 Qxg5 14.hxg3 Qe3+ 15.Kf1 Nf5 is won for Black as mate is inevitable. This was played in
Karlsen,H.-Nordby,B./corr. 1985. However, there's one more move to be considered. 11.h4 "is a real try for saving the game" (Heisman). But it also fails. 11...Nf5! and now
- 12.Qd5? Bf2+ 13.Kd1 Rd8 -+ (Hanison,B.-Kuijpers,GFM/corr. 1998)
- 12.fe Bxd1 13.fe Bxc2 14.Nc3 Qd6 -+
- 12.Qd3 Bf2+ (Heisman only mentioned 12...Nf2 which is worse) 13.Kd1 Rd8 14.Bd5 Nf6 15.fg Rxd5 16.gf Rxd3+ 17.cd Qd7 -+
Sadly for Black, it's not the whole story.
10.Qd3! and he can fix a draw with 10...Be2 11.Qh3 Bg4 12.Qd3 or continue 10...Rd8, but after 11.Nc3 White is coming back to life.
After
9.f3? Nxd5 10.fxg4 inclusion of 10...Nb4? is unnecessary: 11.0-0! and the game is not that clear. Better is immediate
10...Qh4+ with the rest as given by Conquistador (see
Kunze,F.-Giertz,A./corr. 1976). Also, 10.fg is not the only White's option.
- 10.ed. Now Heisman gives 10...Bf5 as the main line, but what he suggests further is not convincing. Probably the most direct way for Black is again 10...Qh4+ 11.g3 (11.Kd2? Bf5 -+) 11...Qh3 12.fg Qg2 -+, transposing to 10.fg
- 10.h4!? is a silicon's choice and it is pretty consistent because of preventing Qe7-h4+. I'm not quite sure about Black's best response, probably 10...Nb4 11.c3 0-0-0 keeping very strong attack. After 11.Na3 in Szabo,I.-Lehmann/corr. 1984 Black apprehensively played 11...h6? preparing castling and subsequently lost. But after 11...0-0-0 12.Bg5 is in fact loosing: 11...0-0-0! 12.Bg5 Qf8 13.Bxd8 Bxf3! -+
9.Qd3 Nxd5 10.c3 Nb4 11.cxb4 Bxb4+ 12.Nc3 Qd7 13.Kf1 Bxc3 14.f3 and Black has spectacular possibility
14...Bxf3! -+, exposing enemy's king.
- 15.gf Qh3+ 16.Kf2 Ba5 followed by 17...Bb6
- 15.Kf2 and only now 15...Ba5 which after 16.gf Qh3 transposes to 15.gf.
Upd. Conquistador did not mention
8.c3 ("a real try", according to Heisman). Black should play
8...Bg4 trying to change game's flow back into 8.Nxh8 course, e.g.
9.Qd2 Nxd5 10.Nxh8 0-0-0 transposes to 8.Nxh8 Bg4 9.Qd2
9.Qd3 Nxd5 10.Nxh8 Nb4 transposes to 8.Nxh8 Bg4 9.Qd3
Only after
9.f3 there's no variant to transpose to. 9...Nxf3 10.gf Nxd5
- 11.Qxd5 Qh4+ 12.Kd2 Qf2+ 13.Kd3 Bxf3 14.Kc4 Be7 -+
- 11.fg Qxf7 12.Rf1 Nf4 -/+
- 11.Qe2 Nf4 12.Bxf4 Bxf3! 13.Qxf3 Qxf7 14.Nd2 Qxf4 -/+