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Subject: Re: Test Position = Movsesian,S - Korobov,A = Aeroflot Open 2004 [34...Qd5!]

Author: John Merlino

Date: 14:04:13 06/02/04

Go up one level in this thread


On June 02, 2004 at 16:32:16, José Antônio Fabiano Mendes wrote:

>   Movsesian,S - Korobov,A = Aeroflot Open, second round, 18/Feb/2004
>   [D]6k1/3nr2p/3p2pQ/1pq3P1/p2r4/P2B4/1PP5/1K1R3R b
>In principle 34...b4 is playable, but on 35.Bxg6! Rxd1+ 36.Rxd1 you have to
>respond with 36...Nf8, as 36...hxg6 loses immediately: 37.Qxg6+ Rg7 38.Qe6+.
>After 36...Nf8 37.axb4 Qxb4 38.c3 and 39.Bd3 White has better chances, but Black
>is more or less OK.
>
>From the variation above, one can see that the most dangerous attacking piece
>for Black is the white bishop. This may then help you to find an interesting
>defensive resource: 34...Qd5! 35.Rdf1 (removing the Rook from the pin)
>35...Rxd3! (by eliminating the bishop Black gets counterplay) 36.cxd3 Qxd3+
>37.Ka1 b4. White’s attack has evaporated, and Black stands well with two pawns
>for the exchange.

CM_SKR on an AMD 2500 needs 0:26 to find the line above, but then finds a slight
change in move order, preferring b4 before Qxd3+:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.81	2823		1...Rd5 2.Rhg1 Qe3 3.Rg2
0:00	1/4	-0.80	10676		1...Rd5 2.Rde1 Rde5 3.Rxe5 Nxe5
0:00	1/5	-0.47	44395		1...Rd5 2.Bxg6 Rxd1+ 3.Rxd1 hxg6
					4.Qxg6+ Rg7 5.Qe6+ Rf7 6.Qg6+ Kf8
					7.Rxd6
0:00	1/6	-0.47	68471		1...Rd5 2.Bxg6 Rxd1+ 3.Rxd1 hxg6
					4.Qxg6+ Rg7 5.Qe6+ Rf7 6.Qg6+ Kf8
					7.Rxd6
0:00	1/7	0.53	177778		1...Rd5 2.Bxg6 Rxd1+ 3.Rxd1 Qe5
					4.Bd3 Rf7 5.c3 Kh8
0:00	1/7	0.26	244785		1...b4 2.axb4 Qe5 3.c3 Rf4 4.Rhf1
					Nb6
0:01	1/7	-0.29	350814		1...Qe5 2.Rd2 Qd5 3.Rhd1 Qc5 4.Rf1
					Rg4 5.Bxg6 hxg6 6.Qxg6+ Rg7
0:02	1/8	-0.14	594387		1...Qe5 2.Rd2 Qd5 3.Bxg6 Qxh1+
					4.Qxh1 Rxd2 5.Bd3 Nb6 6.Bxb5
0:03	1/8	-0.33	821391		1...b4 2.axb4 Rxb4 3.Bxg6 Nf8 4.Rxd6
					Qe5 5.Bxh7+ Rxh7 6.Rg6+ Nxg6 7.Qxh7+
					Kf8
0:10	1/9	0.18	2849391		1...b4 2.Bxg6 Rxd1+ 3.Rxd1 b3 4.Bd3
					Ne5 5.Rf1 Nf3 6.Qf6 bxc2+ 7.Bxc2
0:12	1/9	-0.06	3267637		1...Qe5 2.Rd2 Qd5 3.Rhd1 Kh8 4.c3
					Rg4 5.Bxg6 Qxg5 6.Qxg5 Rxg5 7.Rxd6
					hxg6 8.Rxd7 Rxd7 9.Rxd7
0:16	1/9	-0.21	4524705		1...Qd5 2.Rd2 Qf3 3.Rdd1 Qc6 4.Rdf1
					d5 5.Re1 Rxe1+ 6.Rxe1 Nc5
0:26	1/10	-0.15	7466598		1...Qd5 2.Rdf1 Rxd3 3.cxd3 Qxd3+
					4.Ka1 b4 5.Rd1 Qb3 6.Qh3 bxa3 7.bxa3
					Qb6 8.Qf3 Ne5
0:45	1/11	-0.19	12932840	1...Qd5 2.Rdf1 Rxd3 3.cxd3 b4 4.Rc1
					Qxd3+ 5.Ka1 Nc5 6.Rcf1 Ne6 7.Rc1
					Qf5 8.Rc8+ Nf8 9.Rhc1 bxa3
1:28	1/12	-0.14	26249711	1...Qd5 2.Rdf1 Rxd3 3.cxd3 b4 4.Rc1
					Qxd3+ 5.Ka1 Nc5 6.Rcf1 Ne6 7.Rc1
					Qa6 8.axb4 Qb7

jm



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