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Subject: Re: REQUEST HELP ON B33 LINE

Author: John Merlino

Date: 15:15:41 02/11/04

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On February 11, 2004 at 17:13:16, Bouddha wrote:

>Dear all,
>
>What is black best move here ?
>
>1.e4 c5 2.Cf3 Cc6 3.d4 cxd4 4.Cxd4 Cf6 5.Cc3 e5 6.Cdb5 d6 7.Fg5 a6 8.Ca3 b5
>9.Fxf6 gxf6 10.Cd5 Fg7 11.Fd3 Ce7 12.Cxe7 Dxe7 13.0–0 0–0 14.c4 f5 15.Df3 d5
>16.cxd5 fxe4 17.Fxe4 Tb8 18.Tfd1 Line
>
>[D]1rb2rk1/4qpbp/p7/1p1Pp3/4B3/N4Q2/PP3PPP/R2R2K1 b - - 0 18
>
>If there is no solution in this line, I think that 10...Bg7 is lost.
>
>I would like to find someone to say me that it can defend black position after
>10...Bg7 and try to play it against me.
>Is someone interested ?
>
>Best regards to all.

Assuming you play 11.Bd3, 11...Ne7 doesn't look bad if all you're trying for is
a draw. Kramnik and Topolov have played this move to a draw against very strong
GMs (Anand, Svidler and Shirov). Also, it's the main line, so I would be
surprised if it is actually "lost".

[D]r1bqk2r/4npbp/p2p1p2/1p1Np3/4P3/N2B4/PPP2PPP/R2QK2R w KQkq - 0 12

Now, true, very few GMs LOSE from this position as White. The highest-ranked one
that I can find was ranked 2590. But I would definitely say that Black has
excellent drawing chances.

It seems like the one move that has the most options for White is the 15th. My
database shows seven different moves that have been played here. Only two of
them (Qf3 and cxb5) score better for White. One move (f3) shows equal scoring
for White and Black. And the four other moves (Qe2, Qh5, Re1 and exf5) all score
better for Black.

[D]r1b2rk1/4qpbp/p2p4/1p2pp2/2P1P3/N2B4/PP3PPP/R2Q1RK1 w - - 0 15

Chessmaster 9000, SKR personality on a P4-2.4, prefers cxb5 with a good score.

Time	Depth	Score	Positions	Moves
0:00	1/5	1.05	18738		15.cxb5 axb5 16.Nxb5 Bb7 17.Bc4
					Bxe4 18.Nxd6
0:00	1/6	0.99	47952		15.cxb5 axb5 16.Nxb5 Bb7 17.Qf3
					fxe4 18.Bxe4
0:00	1/7	0.77	136255		15.cxb5 d5 16.exd5 e4 17.Bc4 axb5
					18.d6
0:02	1/8	1.04	395824		15.cxb5 d5 16.exd5 e4 17.Bc4 Bxb2
					18.d6 Qf6
0:04	1/9	0.63	612346		15.cxb5 d5 16.exd5 e4 17.Qe2 Qb4
					18.Bc4 Qxb2 19.Qe3 Re8
0:09	1/9	0.78	1537950		15.Qh5 bxc4 16.Nxc4 Rb8 17.Rfd1
					fxe4 18.Bxe4 f5 19.Bd5+ Kh8 20.Rac1
					e4
0:16	1/10	0.67	2791474		15.Qh5 Rb8 16.exf5 e4 17.Rae1 Bb7
					18.cxb5 axb5 19.Nxb5 d5 20.f6 Qxf6
0:19	1/10	0.73	3238595		15.cxb5 d5 16.exd5 e4 17.Qe2 Qb4
					18.Bc4 Qxb2 19.Qe3 f4
0:38	1/11	0.42	6570158		15.cxb5 d5 16.exd5 e4 17.Qe2 Qb4
					18.Bc4 Qxb2 19.Nc2 axb5 20.Bxb5
					Rd8 21.Bc4
0:52	1/11	0.61	8903880		15.Qh5 bxc4 16.Nxc4 Rb8 17.Rfd1
					f4 18.Be2 Be6 19.Rd2 Rb4 20.Nxd6
					Rd8
2:10	1/12	0.54	23358002	15.Qh5 Rb8 16.exf5 e4 17.Rae1 Bb7
					18.Qg4 bxc4 19.Bxe4 h5 20.f6 hxg4
					21.fxe7
3:40	1/12	0.88	38740132	15.cxb5 Rb8 16.Qe2 fxe4 17.Bxe4
					Be6 18.Rad1 f5 19.Bd5 e4 20.Qc4
					Bf7 21.Bxf7+ Rxf7

Although, certainly, if you have a database at your disposal for every move,
then your chances of finding a winning line are greater. But just try doing it
over the board....

jm



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