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Subject: Re: king and pawns ending

Author: John Merlino

Date: 08:19:21 08/23/02

Go up one level in this thread


On August 23, 2002 at 09:35:40, Frank Phillips wrote:

>[D]7k/7p/8/8/1pP2P2/p7/3K4/8 w - -
>
>I would be interested in your static score for the above position and how your
>search responds.

Chessmaster cannot report a static evaluation, but it takes 10 seconds to see
that White is winning on my PIII-733:

Time	Depth	Score	Positions	Moves
0:00	5/9	-4.85	26490		1.Kc1 Kg7 2.c5 Kf6 3.c6 a2 4.Kb2
					Ke6 5.c7 a1=Q+ 6.Kxa1 Kd7 7.Kb2
					h5 8.Kb3
0:00	5/9	-3.89	31384		1.Kc2 Kg7 2.c5 a2 3.Kb2 a1=Q+ 4.Kxa1
					Kf6 5.Kb2 h5 6.Kb3 h4 7.Kxb4 h3
					8.c6 Ke6
0:00	6/10	-5.16	51244		1.Kc2 Kg7 2.c5 Kf7 3.c6 Ke8 4.f5
					a2 5.Kb2 h5 6.Kxa2 Ke7
0:01	7/11	-4.91	90504		1.Kc2 Kg7 2.c5 Kf7 3.c6 Ke8 4.f5
					a2 5.Kb2 h5 6.Kxa2 Ke7 7.c7
0:02	8/12	-4.28	240157		1.Kc2 Kg7 2.c5 Kf7 3.c6 Ke7 4.f5
					a2 5.f6+ Kxf6 6.c7 a1=Q 7.c8=Q
					Qa2+ 8.Kd3 b3 9.Qc6+ Kg5
0:07	9/13	-0.07	664019		1.Kc2 Kg7 2.c5 Kf7 3.c6 Ke7 4.f5
					b3+ 5.Kxb3 Kd6 6.f6 a2 7.f7 a1=Q
					8.f8=Q+ Kxc6 9.Qh6+ Kc5 10.Qxh7
0:10	9/13	1.81	979288		1.Kc1 Kg7 2.c5 Kf7 3.c6 Ke8 4.f5
					b3 5.f6 a2 6.Kb2 h5 7.c7 Kd7 8.c8=Q+
					Kxc8 9.f7
0:12	10/14	2.87	1198652		1.Kc1 Kg7 2.c5 Kf7 3.c6 Ke8 4.f5
					b3 5.f6 b2+ 6.Kc2 a2 7.Kxb2 h5
					8.c7 Kd7 9.c8=Q+ Kxc8 10.f7
0:18	11/15	5.14	1714965		1.Kc1 Kg7 2.c5 Kf7 3.c6 Ke7 4.f5
					h5 5.f6+ Kxf6 6.c7 Ke5 7.c8=Q Kd4
					8.Qd7+ Kc3 9.Qd2+ Kc4 10.Qa2+ Kd4

>My static score favours white.  The search initially favours black, but then
>recognises white is winning.
>
>(In the actually game the search did not see the danger in time and playing
>Rxd2+
>[D]3r3k/7p/8/8/ppP2P2/8/3BK3/8 b - -).

Chessmaster 9000 avoids Rxd2 in one second:

Time	Depth	Score	Positions	Moves
0:00	1/3	-6.46	1009		1...Rxd2+ 2.Kxd2 a3 3.Kc1 a2 4.Kb2
0:00	1/4	-5.63	1302		1...Rxd2+ 2.Kxd2 a3 3.Kc1 a2 4.Kb2
					a1=Q+ 5.Kxa1 Kg7
0:00	1/5	-5.65	3348		1...Rxd2+ 2.Kxd2 a3 3.Kc1 a2 4.Kb2
					Kg7 5.Kxa2 h5
0:00	2/6	-5.77	10463		1...Rxd2+ 2.Kxd2 a3 3.Kc1 Kg7 4.c5
					a2 5.Kb2 Kf6 6.Kxa2 h5
0:00	3/7	-5.22	23231		1...Rxd2+ 2.Kxd2 a3 3.Kc1 Kg7 4.c5
					a2 5.Kb2 Kf6 6.c6 a1=Q+ 7.Kxa1 Ke6
0:00	4/8	-4.78	49810		1...Rxd2+ 2.Kxd2 a3 3.Kc1 Kg7 4.c5
					a2 5.Kb2 Kf7 6.c6 Ke8 7.c7 a1=Q+
					8.Kxa1 Kd7
0:01	4/8	-4.93	73815		1...Rb8 2.Kd3 a3 3.Bc1 Kg7 4.c5
					Rc8 5.Kc4
0:02	5/9	-5.21	163159		1...Rb8 2.Kd3 Kg8 3.Bc1 Rd8+ 4.Ke4
					a3 5.c5 Rd1 6.Be3 b3
0:05	6/10	-5.81	427032		1...Rb8 2.Kd3 Kg8 3.c5 b3 4.Bc3
					b2 5.Bxb2 Rxb2 6.c6 Rb1 7.c7 Rc1
0:10	7/11	-6.03	891322		1...Rb8 2.Kd3 Kg8 3.Bc1 Rd8+ 4.Ke2
					a3 5.c5 Rc8 6.Be3 a2 7.Bd4 Rxc5
					8.Bxc5 a1=Q 9.Bxb4
0:32	8/12	-6.01	2820852		1...Rb8 2.Bc1 Kg8 3.f5 a3 4.Kd3
					Ra8 5.c5 a2 6.Bb2 a1=Q 7.Bxa1 Rxa1
					8.c6 Kf7
1:16	9/13	-6.13	6854224		1...Rb8 2.Bc1 Kg8 3.f5 Kf7 4.c5
					Rc8 5.Be3 Kf6 6.Kd3 Kxf5 7.Bd4 a3

jm



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