TonyRo wrote on 05/11/09 at 15:03:21:
Quote:Black has a few other 13th moves, but White's position looks playable indeed. I have had another look and my pessimism is reduced:
1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6 5.Bc4 exf3 6.Nxf3 Bf5 7.Bg5 e6 8.Qe2 Bb4 9.0-0
a) 9...Nbd7 10.d5 Qb6+ 11.Kh1 Bxc3 12.dxe6.
b) 9...Be7 10.Rad1 (10.Rae1 Nbd7 and now what?) 0-0 (Nbd7 11.Ne5 Nxe5 12.dxe5 Qb6+ 13.Be3 Bc5 14.exf6 Bxe3+ 15.Kh1 0-0 16.fxg7 Kxg7 17.Rd7) 11.Ne5 h6 12.Nxf7 Rxf7 13.Bxf6 Bxf6 14.g4 Bg6 15.Bxe6 Qb6 16.Nxe4 Bxd4+ 17.Kg2.
c) 9...0-0 10.Bxf6 Qxf6 (gxf6 11.Ne4 Bg6 12.c3 Be7 13.Rae1) 11.Ne4 Qh6 12.Ne5.
Not all these lines are mine; line c was given by FM Bücker but I don't remember whose idea line a was.
All this looks quite decent for White.
MNb, your analysis seems to contain quite a few inaccuracies in my opinion. In line a, 11...Bxc3 is dubious on account of 12. dxe6! Black should play 11...cxd5, not allowing 12. dxe6, when maybe White still has enough, maybe not. Either way, it's certainly tougher to prove after this move.
In line b, you give 10...Nbd7 11. Ne5 Nxe5, but 11...Nxe5 is exactly what White wants. 11...0-0 should be much better, when White probably doesn't have enough.
In line c, 11...Qd8 is probably better.
b) 10...Nbd7 11.Ne5 0-0 (iso 11...Nxe5) 12.g4 Bg6 13.h4 - I admit it's kind of desperado/kamikaze, but as Black already has castled, who knows?
c) 11...Qd8 (iso 11...Qh6) is also met with Bückers idea 12.c3 Be7 13.Ng3 Bg6 14.Ne5 with active pieceplay.
a) 9...Nbd7 10.d5 Qb6+ 11.Kh1 cxd5 poses a problem though.
Now what I really would like if some BDG-expert like ArkHein or even Bücker himself could comment. And JediKnight's ideas are very welcome as well. Wouldn't it be nice if White could prove sufficient compensation after 5...c6 6.Bc4 after all? I still have doubts of course.
Uruk wrote on 05/11/09 at 11:26:17:
You will see ArkheiN, SWJedi and you yourself (!)
agree that 5...Bf5 is at least =+ and that Ne5 is nothing.
My enthusiasm about that line waned when ArkHein reminded me of the Schoupal-Bonsai game. Until now you have brought up nothing to revive it, especially as you don't address my main point: the strength of the move Nc5, which was not possible in both Karpov games.
For the sake of clarity: I would love to see 5...Bf5 proven the refutation of the BDG and 5...c6 6.Bc4 playable (gambiting the Caro-Kann! Ha!). I even tend to agree that on general grounds 5...Bf5 should be better than 5...c6. But I want empirical evidence in the form of moves as well. As a result I suffer from cognitive dissonance. In such cases I
always give priority to the moves and their evaluation.
So again: give an improvement on Bonsai's play
and show that White has enough compensation after 5...c6 6.Bc4 and I will be a happy man again. Until then I can't back your statements. So I return the "come on".