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Subject: Re: A couple of test positions

Author: Jaime Benito de Valle Ruiz

Date: 15:21:14 11/12/04

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Could you please post the CM analysis for the first position here? Thanks


On November 12, 2004 at 13:27:46, John Merlino wrote:

>On November 12, 2004 at 08:03:52, Albert Silver wrote:
>
>>The following shots were played by some Pro Deo settings I'm working on, against
>>Fritz 8.0.0.26. Some engines should not have too much trouble, others may have
>>more. They're nice shots in any case.
>>
>>[D]r1b2rk1/1p2bpp1/pqn1p2p/8/2B1QB1P/P3PN2/1P3PP1/1K1R3R w - - 0 16
>>
>>The game went quite spectacularly and PD played 16.Ng5! afer which the game
>>proceeded with 16...g6 17.Nxf7! Kxf7 18.h5! Bxa3 19.Qxg6+ Ke7 20.Rd2 Bb4 21.Rd3
>>Qc5 22.Bxh6 Rf5 23.Rhd1!! and black resigned a few moves later.
>>
>>[D]r1r3k1/pp2bpp1/2n1b2p/q2n4/3P2P1/P1NB1N1P/1PQB1P2/1K1R3R b - - 0 17
>>
>>Here PD played the strong 17...Ncb4! (not obvious to find for a human IMO) and
>>play went 18.axb4 Bxb4 19.Bh7+ Kh8 20.Be4 Rxc3! 21.Bxc3 Nxc3+ 22.bxc3 Bxc3
>>23.Qxc3 Qxc3 and white is lost.
>
>CM9_R1 on an AMD 2500 needs less than one second to find the first one. For the
>second one, it takes almost three minutes:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	0.84	4333		17...Bd6 18.Nb5 Qd8 19.Nxd6 Qxd6
>0:00	1/3	0.47	5773		17...a6 18.Be4 Nxc3+ 19.Bxc3 Qb5
>0:00	1/3	0.39	7190		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kf8 20.Qd3
>0:00	1/4	-0.11	13587		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kf8 20.Be4 Qa2+ 21.Kc1
>0:00	1/5	-0.29	49049		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kf8 20.Be4 Qa2+ 21.Kc1 Na5
>0:00	1/6	-0.22	98401		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kf8 20.Qd3 Qa2+ 21.Kc1 Na5 22.Nd2
>0:01	1/7	-0.16	251861		17...Nxc3+ 18.Bxc3 Qd5 19.Be4 Qa2+
>					20.Kc1 Bd6 21.Kd2 Na5 22.Ne5 Bxe5
>					23.dxe5
>0:03	1/8	-0.35	753451		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kf8 20.Be4 Qa2+ 21.Kc1 Na5 22.Rde1
>					Bd6 23.Kd1 Bf4
>0:11	1/9	-0.38	2500209		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kh8 20.Be4 Qa2+ 21.Kc1 Bb3 22.Qb1
>					Qxb1+ 23.Bxb1 Bd5 24.Rd3 Nxd4 25.Rxd4
>					Bxf3
>0:27	1/10	-0.19	6254029		17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kh8 20.Be4 Qa2+ 21.Kc1 Na5 22.Rde1
>					Bd6 23.Bf5 Bxf5 24.Qxf5 Bxa3
>1:50	1/11	-0.42	26550604	17...Nxc3+ 18.Bxc3 Qd5 19.Bh7+
>					Kh8 20.Be4 Qa2+ 21.Kc1 Bd6 22.Kd2
>					Bf4+ 23.Ke1 Bb3 24.Qb1 Re8 25.Ne5
>					Qxb1 26.Rxb1 Nxe5 27.dxe5 Bxe5
>					28.Bxe5 Rxe5
>2:53	1/11	-2.37	43613895	17...Ncb4 18.axb4 Bxb4 19.Bh7+
>					Kh8 20.Na4 Rxc2 21.Bxc2 Bxd2 22.Rxd2
>					b6 23.b3 Rd8
>3:22	1/12	-2.23	51354882	17...Ncb4 18.axb4 Bxb4 19.Bh7+
>					Kh8 20.Na4 Rxc2 21.Bxc2 b6 22.b3
>					Rc8 23.Bxb4 Nxb4
>5:08	1/13	-2.35	80953844	17...Ncb4 18.axb4 Bxb4 19.Bh7+
>					Kh8 20.Na2 Rxc2 21.Bxc2 Bxd2 22.Rxd2
>					Kg8 23.Re1 Rd8 24.Rde2
>
>jm



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