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Subject: Re: Test Position = Study by David Przepiorka [Vorwärts, 1910]

Author: John Merlino

Date: 17:30:58 02/05/04

Go up one level in this thread


On February 05, 2004 at 20:15:44, Dieter Buerssner wrote:

>On February 05, 2004 at 17:11:54, John Merlino wrote:
>
>>Also, I can't find a clear win for White after 1.Rb8 Nxh6! 2.gxh6 (or 2.Kxe7
>>Nf5+) Nc6.
>
>Yace shows mate score for Rc8, here.
>
>Regards,
>Dieter

Interesting. After 3.Rc8, the PV for The King (SKR personality on a P4-2.4)
doesn't even get down to 5 pieces after almost 3 minutes on a P4-2.4:

Time	Depth	Score	Positions	Moves
0:00	1/8	0.98	33743		3...Kb6 4.Kd6 Nd4 5.Rb8+ Ka5 6.Kd5
					Nf5 7.Kc5 Ka6
0:00	1/8	0.71	48928		3...Kb5 4.Kd6 Nd4 5.Ke5 Nf3+ 6.Ke4
					Nd2+ 7.Kd3 Nf3 8.Rb8+ Kc5 9.Ke3
0:00	2/9	0.44	94621		3...Kb5 4.Kd6 Na5 5.Ke5 b3 6.Kd4
					Kb4 7.Rb8+ Ka3 8.Kc3 Ka2
0:00	3/10	0.89	241787		3...Kb5 4.Re8 b3 5.Kf7 b2 6.Re1
					Nb4 7.Kg7 Nd3 8.Rb1 Kc4 9.Kxh7
0:01	4/11	0.64	431968		3...Kb5 4.Re8 b3 5.Kf7 b2 6.Re1
					Kc4 7.Kg7 Ne5 8.Kxh7 Nf7 9.Re4+ Kd3
0:04	5/12	0.52	1156109		3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Kc5 Nxh6 8.Rxb4+ Ka3 9.Rh4
					Nf5 10.Rh3+ Ka4 11.Rxh7
0:06	6/13	0.53	1886468		3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Kc5 Nxh6 8.Rxb4+ Ka3 9.Rh4
					Nf5 10.Rxh7 Ne3 11.Re7
0:11	7/14	0.54	3552866		3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Kc4 Ka3 8.Rb6 Ne3+ 9.Kd3
					Ng4 10.Kc2 Ne3+ 11.Kc1 Nc4 12.Rb7
0:22	8/15	0.86	6879771		3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Rb6 Ka3 8.Ke4 Ne7 9.Kd3 Nd5
					10.Rb7 Nf6 11.Kc2
0:40	9/16	1.27	12936184	3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Rb6 Ka3 8.Ke4 Ng3+ 9.Kd3
					Nf5 10.Rf6 Ne7 11.Rf7 Ng6 12.Rxh7
					b3
1:18	10/17	1.53	25881416	3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Rb6 Ka3 8.Ke4 Ne7 9.Kd4 Nf5+
					10.Kd3 Kb3 11.Rf6 Ne7 12.Rf7 Ng6
					13.Rxh7
2:48	11/18	1.57	55066443	3...Kb5 4.Kd6 Nd4 5.Kd5 Nf5 6.Rb8+
					Ka4 7.Rb6 Kb3 8.Rf6 Ne3+ 9.Kd4
					Nc2+ 10.Kd3 Kb2 11.Rf7 b3 12.Rxh7
					Nb4+ 13.Ke4 Kc1 14.Rc7+ Nc2 15.Rb7

How long did it take Yace to come up with this mate score and on what CPU?
What's the PV?

jm



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