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Subject: Endgame Trap

Author: Gian-Carlo Pascutto

Date: 12:03:48 07/16/02

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

Re: Endgame Trap Oliver Roese 12:41:45 07/17/02
- Re: Endgame Trap Dieter Buerssner 15:14:25 07/17/02
- Re: Endgame Trap Uri Blass 15:06:51 07/17/02
Re: Endgame Trap J. Wesley Cleveland 10:06:52 07/17/02
Re: Endgame Trap Dieter Buerssner 15:30:42 07/16/02
Re: Endgame Trap Roy Eassa 15:24:10 07/16/02
Re: Endgame Trap Terry McCracken 15:15:42 07/16/02
Re: Endgame Trap John Merlino 12:39:16 07/16/02
Re: Endgame Trap Slater Wold 12:30:13 07/16/02
- Re: Endgame Trap Slater Wold 13:17:43 07/16/02
  - Re: Endgame Trap Mike Byrne 17:00:48 07/16/02

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