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Subject: Re: position

Author: John Merlino

Date: 15:41:07 09/03/04

Go up one level in this thread


On September 03, 2004 at 16:32:49, Will Singleton wrote:

>On September 03, 2004 at 15:56:34, Will Singleton wrote:
>
>>[d]3r2k1/2Rbqpp1/7r/p2pPB2/1p1P3p/P3QN1P/1P3PP1/6K1 w - - bm axb4 Ng5
>>
>>Amateur gets this in 38 sec on a p4 2.8ghz.  I prefer Ng5 right away, but
>>deferring one move doesn't seem to hurt.  Strangely enough, in the actual game
>>Amateur did play Ng5, probably due to the hash being full.  In that game, all
>>the pieces were quickly traded off, leaving a one pawn advantage which was
>>enough to win easily.
>>
>>12 75 1494 6127807 Ra7 bxa3 bxa3 a4 Qf4 Qe8 Bxd7 Rxd7 Rxa4 Rb7 Rb4 Rxb4 axb4
>>13 71 3148 12689987 Ra7 bxa3 bxa3 a4 Qf4 Qe8 Ng5 f6 Bxd7 Rxd7 Rxd7 Qxd7 e6
>>13 116 3884 15700621 axb4 axb4 Ng5 b3 Qf4 Qe8
>>14 144 5171 20830021 axb4 axb4 Ng5 Rc6 Rxc6 Bxc6 Qf4 Ra8 Bh7 Kf8 Bg6 f6
>
>Hmmm, actually, the postion might be won anyway.  Still, you might check how
>long it takes to get a good score.

CM9_SKR on an AMD 2500 needs 2:18 to see that Ng5 is better than axb4. But the
score isn't terribly high:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.61	2006		1.axb4 axb4 2.Qc1 Ra6
0:00	1/4	0.61	6554		1.axb4 axb4 2.Qc1 Ra6
0:00	1/5	0.44	22335		1.axb4 axb4 2.Ra7 Qe8 3.Bd3 Rc8
0:00	1/6	0.50	73254		1.axb4 axb4 2.Ra7 Qe8 3.Bd3 Bb5
0:00	1/6	0.60	85773		1.Ra7 bxa3 2.bxa3 Rb6 3.Qd2 a4
					4.Nxh4 Qxh4 5.Bxd7
0:01	1/7	0.49	151544		1.Ra7 bxa3 2.bxa3 Qe8 3.Bxd7 Rxd7
					4.Rxa5 Qd8
0:02	1/8	0.62	380287		1.Ra7 bxa3 2.bxa3 a4 3.Rb7 Qe8
					4.Bd3 Rc8 5.Qg5
0:04	1/9	0.34	748289		1.Ra7 bxa3 2.bxa3 a4 3.Qd2 Rb6
					4.Rc7 Rb3 5.Qc1
0:06	1/9	0.43	1204147		1.Qd2 Qe8 2.Bd3 Rc8 3.Rxc8 Qxc8
					4.axb4 axb4 5.Qxb4 Bf5 6.Bxf5 Qxf5
0:11	1/10	0.36	2718149		1.Qd2 Qe8 2.Bd3 Rb8 3.Rc5 bxa3
					4.bxa3 a4 5.Rxd5 Rb3 6.Rc5 Rxa3
0:13	1/10	0.51	3120363		1.Ra7 bxa3 2.bxa3 Qe8 3.Bxd7 Rxd7
					4.Rxa5 Rb6 5.Qc1 Qd8 6.Rc5
0:22	1/11	0.43	5679836		1.Ra7 bxa3 2.bxa3 Qe8 3.Bxd7 Rxd7
					4.Rxa5 Qd8 5.Rc5 Rb6 6.a4 Rb2
0:33	1/11	0.47	8249437		1.Qd2 Qe8 2.Bd3 Rc8 3.Rxc8 Bxc8
					4.axb4 axb4 5.Qxb4 Ba6 6.Bxa6 Rxa6
					7.Nxh4 Ra1+ 8.Kh2 Qc8
1:01	1/12	0.27	16014283	1.Qd2 Qe8 2.Bd3 bxa3 3.bxa3 a4
					4.Qa5 Rc8 5.Rxc8 Qxc8 6.Qxd5 Be6
					7.Qc5 Qxc5 8.dxc5
1:07	1/12	0.42	17742948	1.Ra7 bxa3 2.bxa3 Qe8 3.Bxd7 Rxd7
					4.Rxa5 Qd8 5.Rc5 Rb6 6.Qd3 Rb2 7.a4
1:29	1/12	0.79	24080218	1.axb4 axb4 2.Ng5 Rh5 3.e6 Rxg5
					4.Rxd7 Rxd7 5.exd7 Kf8 6.Qf4 Qd8
					7.Qd6+ Kg8 8.Qxd5
2:18	1/12	0.83	38010762	1.Ng5 bxa3 2.bxa3 Rh5 3.e6 Rxg5
					4.Rxd7 Rxd7 5.exd7 Kf8 6.Qf4 Qd8
					7.Qd6+ Kg8 8.Qxd5
3:36	1/13	1.00	60234678	1.Ng5 bxa3 2.bxa3 Rc6 3.e6 Rxc7
					4.exf7+ Kf8 5.Nh7+ Kxf7 6.Bg6+
					Kxg6 7.Qxe7 Rcc8 8.Ng5 Bf5 9.Nf3
					Kh7 10.Qxh4+ Kg8

jm



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