bragesjo wrote on 01/30/10 at 21:44:49:
Thanks, I will have a closer look later but I can agree that Nxe6 lines is at least more ambitious than the usual dull endgames resulting from 9 g4.
bragesjo wrote on 02/01/10 at 20:15:57:
Have look a bit closer, the line is in fact serious winning try (maybee even better than 9 0-0-0 these days) and has been negacted by theory. Both sides will get lots of play, maybee white has the slightly better prospecs.
Last few days I have looked at this 9.g4 stuff, but neglected ...e6 so far. I agree that those endgames resulting from Nc3-d5 are dull. Fortunately this move is not necessary; neither is the prophylactic Kc1-b1. White scores amazingly well after 9.g4 Be6 10.O-O-O Nxd4 11.Bxd4 Qa5 12.a3 Rab8 13.h4 Rfc8 14.h5 b5 15.hxg6. A few interesting lines:
a) 15...b4 16.gxh7+ Kh8 17.Nb1, an idea (not mine) borrowed from the Argentinean Attack in the Pirc. White can afford Black invading with the Queen to a1.
b) 15...fxg6 16.g5 b4 17.Nb1 b3 18.c4 might be worth a try too.
c) 15...fxg6 16.g5 Nh5 17.Bxg7 Sax-Relange and perhaps 17.Bh3 Dobrin-Jobe, corr IECC 1999 look promising.
d) 15...hxg6 16.Qg5 d5! equalizes and so does 16.g5 b4 17.gxf6. So this might be the right moment to play the endgame with 16.Nd5.
My impression is that chances are equal indeed, but that Black walks quite a narrow road to maintain that equality. White's play is very simple and easy to learn. There is not much theory to learn - especially compared to some Anti-Sicilians - so 9.g4 suits the aggressive amateur very well.
If 10.Nxe6 is dangerous as well then White has an equally aggressive option with 9.g4, similar in ideas. I'm not so sure if 9...Nxd4 10.Bxd4 Be6 11.h4 is objectively better, mainly because I haven't all the transpositions figured out yet - White always can castle Queenside if it suits, though usually has to play a2-a3 first. For instance, to anticipate line d above, 11...Qa5 12.h5 Rfc8 13.hxg6 hxg6 14.a3 (14.g5 Nh5 15.Bxg7 Kxg7 16.f4 Skacel-Vacek, CZE 2005, Nxf4 17.Qxf4 Rxc3 -+) Rab8 (b5 at once) and now 15.O-O-O b5 transposes. But is 15.Bd3 really better?