Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Endgame Trap

Author: John Merlino

Date: 12:39:16 07/16/02

Go up one level in this thread


On July 16, 2002 at 15:03:48, Gian-Carlo Pascutto wrote:

>From a game Sjeng-Hiarcs
>
>[D]8/8/6b1/1k6/p2K4/P7/1P6/8 b - - 0 71
>
>My engine statically says this is a draw (bishop + wrong pawn).
>
>In reality, black mates in 23 or less.
>
>Makes my search go bonkers (and for some other programs as well)
>
>Sjeng 12.14 Maastricht - Hiarcs 7.32
>8/8/6b1/1k6/p2K4/P7/1P6/8 b - - 0 1
>
>Analysis by Sjeng 12.14 Maastricht:
>
>71...Bf5 72.Kc3
>  =  (0.00)   Depth: 2   00:00:00
>71...Bf5 72.Kc3 Bb1
>  =  (0.00)   Depth: 3   00:00:00
>71...Bf5 72.Kc3 Bb1
>  =  (0.00)   Depth: 3   00:00:00
>71...Bf5 72.Kc3 Bb1 73.Kd2
>  =  (0.00)   Depth: 4   00:00:00
>71...Bf5 72.Kc3 Bb1 73.Kd2
>  =  (0.00)   Depth: 4   00:00:00
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5
>  =  (0.00)   Depth: 5/7   00:00:00
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5
>  =  (0.00)   Depth: 5/7   00:00:00
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 6/7   00:00:00  3kN, tb=32
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 6/10   00:00:00  5kN, tb=43
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 7/10   00:00:00  8kN, tb=68
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 7/12   00:00:00  13kN, tb=102
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 8/12   00:00:00  18kN, tb=147
>71...Bf5 72.Kc3 Bb1 73.Kd2 Bf5 74.Kc3 Bb1 75.Kd2 Bf5 76.Kc3
>  =  (0.00)   Depth: 8/12   00:00:00  22kN, tb=181
>71...Bf5 72.Kd5 Bd3 73.Kd4 Bf5 74.Kd5 Bd3 75.Kd4 Bf5
>  =  (0.00)   Depth: 9/12   00:00:00  36kN, tb=350
>71...Bf5 72.Kd5 Bd3 73.Kd4 Bf5 74.Kd5 Bd3 75.Kd4 Bf5
>  =  (0.00)   Depth: 9/14   00:00:00  55kN, tb=549
>71...Bf5 72.Kd5 Bd3 73.Kd4 Bf5 74.Kd5 Bd3 75.Kd4 Bf5
>  =  (0.00)   Depth: 10/14   00:00:00  60kN, tb=672
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3
>  =  (-0.01)   Depth: 10/19   00:00:00  79kN, tb=944
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3
>  =  (-0.01)   Depth: 10/19   00:00:00  88kN, tb=1103
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3
>  =  (-0.01)   Depth: 11/19   00:00:00  95kN, tb=1328
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3
>  =  (-0.01)   Depth: 11/19   00:00:00  125kN, tb=1910
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3 76.Kxb3
>  =  (-0.01)   Depth: 12/19   00:00:01  144kN, tb=2258
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3 76.Kxb3
>  =  (-0.01)   Depth: 12/19   00:00:01  173kN, tb=2727
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3 76.Kxb3
>  =  (-0.01)   Depth: 13/19   00:00:01  204kN, tb=3305
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3 76.Kxb3
>  =  (-0.01)   Depth: 13/22   00:00:01  251kN, tb=4163
>71...Bf7
>  ³  (-0.51)   Depth: 14/22   00:00:01  280kN, tb=4956
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3 axb3 76.Kxb3
>  =  (-0.01)   Depth: 14/22   00:00:01  291kN, tb=5383
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg6+ 74.Kc3 Bf5 75.b3
>  =  (-0.01)   Depth: 14/23   00:00:01  337kN, tb=6708
>71...Bf7
>  ³  (-0.51)   Depth: 15/23   00:00:01  380kN, tb=7181
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg8 74.Kc3 Bc4 75.Kd2 Kd4 76.Kc1 Kd3 77.Kb1 Bb3
>78.Kc1 Bg8 79.b3 Bxb3
>  -+  (-3.23)   Depth: 15/23   00:00:01  477kN, tb=8122
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg8 74.Kc3 Bc4 75.Kd2 Kd4 76.Kc1 Kd3 77.Kb1 Bb3
>78.Kc1 Bg8 79.b3 Bxb3
>  -+  (-3.23)   Depth: 15/24   00:00:02  611kN, tb=9871
>71...Bf7
>  -+  (-3.99)   Depth: 16/24   00:00:02  618kN, tb=10161
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg8 74.Kc3 Bc4 75.Kc2 Kd4 76.Kb1 Kd3 77.Kc1 Bf7
>78.Kb1 Kd4 79.Kc1 Kc4 80.Kc2 Bg6+
>  -+  (-3.23)   Depth: 16/24   00:00:02  744kN, tb=11595
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bg8 74.Kc3 Bc4 75.Kc2 Kd4 76.Kb1 Kd3 77.Kc1 Bf7
>78.Kb1 Kd4 79.Kc1
>  -+  (-3.23)   Depth: 16/27   00:00:02  1078kN, tb=16039
>71...Bf7
>  -+  (-3.99)   Depth: 17/27   00:00:02  1101kN, tb=16279
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bb3 74.Kc3 Bc4 75.Kd2 Kd4 76.Kc1 Bd3 77.Kd2 Kc4
>78.Kd1 Kc5 79.b3 axb3 80.Kd2 Kc4 81.Kc1
>  -+  (-5.03)   Depth: 17/27   00:00:03  1428kN, tb=18212
>71...Bf7 72.Kc3 Kc5 73.Kd3 Bb3 74.Kc3 Bc4 75.Kd2 Kd4 76.Kc1 Bd3 77.Kd2 Kc4
>78.Kd1 Kc5 79.b3 axb3 80.Kd2 Kc4 81.Kc1
>  -+  (-5.03)   Depth: 17/34   00:00:03  1504kN, tb=20000
>71...Bf7
>  -+  (-5.58)   Depth: 18/34   00:00:03  1541kN, tb=20560
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.Kd2 Bb3 76.Ke2 Kd4 77.Kd2 Kc4
>  -+  (-#26)   Depth: 18/34   00:00:05  3958kN, tb=49329
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.Kd2 Bb3 76.Ke2 Kd4 77.Kd2 Kc4
>  -+  (-#26)   Depth: 18/38   00:00:05  4042kN, tb=52732
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.b3 axb3
>  -+  (-#23)   Depth: 19/38   00:00:05  4281kN, tb=78516
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.b3 axb3
>  -+  (-#23)   Depth: 19/38   00:00:06  4382kN, tb=82299
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.b3 axb3
>  -+  (-#23)   Depth: 20/38   00:00:06  4664kN, tb=108663
>71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5 74.Kc3 Ke4 75.b3 axb3
>  -+  (-#23)   Depth: 20/38   00:00:06  4793kN, tb=113744
>
>(Pascutto, Gent 16.07.2002)
>
>--
>GCP

Chessmaster 9000 (PIII-600) says:

Time	Depth	Score	Positions	Moves
0:01	8/12	-2.35	129104		71...Bf7 72.Kc3 Kc5 73.Kd3 Ba2
					74.Kc3 Bb3 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kb4
0:01	9/13	-2.32	241719		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Ke4 Ba2 75.Ke3 Kc4 76.Kd2 Bb1
					77.Kc1 Be4 78.Kd2
0:02	10/14	-2.32	418557		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Kd5 75.Kb4 Bb3 76.Kb5 Kd4
					77.Kb6 Kc4 78.Ka7 Kc5 79.Kb7
0:04	11/15	-2.29	657892		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Kd5 75.Kb4 Bb3 76.Kc3 Ke4
					77.Kd2 Kd4 78.Kc1 Ba2 79.Kc2 Bd5
0:06	12/16	-2.26	991291		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Kd5 75.Kb4 Bb3 76.Kc3 Ke4
					77.Kd2 Kd4 78.Kc1 Ba2 79.Kd2 Bd5
0:08	13/17	-2.16	1464183		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Kd5 75.Kb4 Bb3 76.Kc3 Ke4
					77.Kd2 Bd5 78.Kc3 Ba2 79.Kb4 Bb3
					80.Kc3
0:11	14/18	-2.15	2101527		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Kd5 75.Kb4 Bb3 76.Kc3 Ke4
					77.Kd2 Bd5 78.Kc3 Ke5 79.Kb4 Bb3
					80.Kc3 Be6 81.Kb4
0:14	15/19	-2.20	2640321		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Ba2 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kb4 Bb3 78.Kc3 Ke3 79.Kb4 Kd4
					80.Ka5 Kc5 81.Ka6 Be6 82.Ka7
0:19	16/20	-2.20	3415427		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Ba2 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kc2 Kd4 78.Kd2 Be6 79.Kc2 Bf5+
					80.Kd2 Be4 81.Ke2 Bc6 82.Kf1
0:28	17/21	-3.15	4656596		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Ba2 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kc2 Kd4 78.Kd2 Bf7 79.Kc1 Bg6
					80.Kd2 Kc4 81.Ke3 Kb3 82.Kd4 Kxb2
0:35	18/22	-3.15	5908938		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Ba2 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kc2 Kd4 78.Kd2 Be6 79.Kc2 Bf5+
					80.Kc1 Kc4 81.Kd2 Bg6 82.Ke3 Kb3
					83.Kd4 Kxb2
0:48	19/23	-3.54	7889830		71...Bf7 72.Kc3 Kc5 73.Kd3 Bc4+
					74.Kc3 Ba2 75.Kd3 Kd5 76.Kc3 Ke4
					77.Kc2 Ke3 78.Kd1 Bb1 79.Kc1 Bd3
					80.b4 axb3ep 81.Kb2 Bc2 82.a4 Kd4
					83.a5
4:05	20/24	-4.89	32974048	71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5
					74.Kc3 Ke4 75.Kc2 Kd4 76.Kb1 Kd3
					77.Kc1 Ba2 78.b4 axb3ep 79.Kb2
					Kc4 80.a4 Kb4 81.a5 Kxa5 82.Kc1
					Kb4 83.Kb2 Kc4
4:35	21/25	-4.99	37021299	71...Bf7 72.Kc3 Kc5 73.Kd3 Kd5
					74.Kc3 Ke4 75.Kc2 Kd4 76.Kb1 Kd3
					77.Kc1 Ba2 78.Kd1 Bb3+ 79.Kc1 Bc2
					80.b4 axb3ep 81.Kb2 Kc4 82.a4 Kb4
					83.a5 Kxa5 84.Kc3

jm



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.