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Subject: Re: difficult problem

Author: Uri Blass

Date: 01:16:08 09/08/02

On September 08, 2002 at 03:54:40, allan johnson wrote:

> How many programmes see that white is winning here?The black king is stalemated
>and white's pieces are all on white squares so the white king can simply walk to
>c8. Shredder6 and Chess Tiger 14 on my Celeron1.2 show a -6+ for white I guess
>that it is too many plies for them.
> [D]B7/p1p5/kb1p4/p3p3/P1N2p2/6p1/7p/K7/
> Al

Yace can see 2.03 pawns improvement for white

The score at depth 1 is 7.54 pawns for black
The score at depth 19 is 5.51 pawns for black

New position
[D]B7/p1p5/kb1p4/p3p3/P1N2p2/6p1/7p/K7 w - - 0 1

Analysis by Yace 0.99.56:

1.Nxb6 axb6
  -+  (-8.93)   Depth: 1   00:00:00
1.Nxe5 dxe5
  -+  (-7.56)   Depth: 1   00:00:00
1.Bh1
  -+  (-7.54)   Depth: 1   00:00:00
1.Bh1 Bd4+ 2.Kb1
  -+  (-7.51)   Depth: 2   00:00:00
1.Kb1 c5 2.Nxe5 dxe5
  -+  (-7.48)   Depth: 2   00:00:00
1.Kb1 Bd4
  -+  (-7.47)   Depth: 2   00:00:00
1.Kb1 Bd4 2.Nxe5
  -+  (-7.47)   Depth: 3   00:00:00
1.Bh1 Bg1
  -+  (-7.46)   Depth: 3   00:00:00
1.Bh1 Bf2 2.Nxe5
  -+  (-7.18)   Depth: 3   00:00:00
1.Bh1 Bf2 2.Kb1 Bd4
  -+  (-7.08)   Depth: 4   00:00:00
1.Bh1 Bf2 2.Kb2 Bc5 3.Kc3
  -+  (-7.01)   Depth: 5   00:00:00  5kN
1.Bh1 Bf2 2.Kb2 Bc5 3.Kc3 Bd4+ 4.Kc2 Bc5 5.Nxe5
  -+  (-6.96)   Depth: 6   00:00:00  13kN
1.Nd2 Bf2 2.Nf1 Bb6
  -+  (-6.95)   Depth: 6   00:00:00  13kN
1.Nd2 Bd4+ 2.Kb1 Kb6 3.Nf1 c6 4.Nxh2
  -+  (-6.91)   Depth: 6   00:00:00  13kN
1.Nd2 Bf2 2.Nf1 Kb6 3.Nxh2 gxh2 4.Bf3 c5
  -+  (-6.84)   Depth: 7   00:00:00  48kN
1.Nd2 Bd4+ 2.Kb1 Kb6 3.Bh1 Kc5 4.Nf1 d5 5.Nxh2
  -+  (-6.83)   Depth: 8   00:00:00  112kN
1.Nd2 Bd4+ 2.Kb1 Kb6 3.Bh1 Kc5 4.Nf1 Kb4 5.Nxh2 Kxa4
  -+  (-6.76)   Depth: 9   00:00:01  219kN
1.Bh1 Bd4+ 2.Kb1 Bc5 3.Nd2 g2 4.Bxg2 Bf2
  -+  (-6.75)   Depth: 9   00:00:01  219kN
1.Bh1 Bd4+ 2.Kb1 Bg1 3.Nd2 Kb6 4.Nf1 c5 5.Kc2 a6 6.Nxh2
  -+  (-6.73)   Depth: 9   00:00:01  219kN
1.Bh1 Bd4+ 2.Kb1 Bc3 3.Kc2 Be1 4.Kd3 Bf2 5.Nxe5 dxe5 6.Ke2
  -+  (-6.79)   Depth: 10   00:00:01  572kN
1.Nd2 Bd4+ 2.Kb1 Kb6 3.Bh1 Kc5 4.Nf1 Kb4 5.Nxh2 d5
  -+  (-6.78)   Depth: 10   00:00:02  572kN
1.Nd2 Bd4+ 2.Kb1 Kb6 3.Bh1 Kc5 4.Nf1 c6 5.Nxh2 gxh2 6.Be4
  -+  (-6.78)   Depth: 10   00:00:02  726kN
1.Kb1 Bd4 2.Kc2 Bg1 3.Nd2 Kb6 4.Bh1 c6 5.Nf1 Kc5 6.Nxh2
  -+  (-6.77)   Depth: 10   00:00:02  726kN
1.Kb1 Bf2 2.Nd2 Kb6 3.Bh1 Kc5 4.Nf3 Kb4 5.Nxh2 gxh2 6.Bc6
  -+  (-6.73)   Depth: 10   00:00:02  726kN
1.Kb2 Bf2 2.Nd2 Kb6 3.Bf3 Kc5 4.Nf1 Be3 5.Nxh2 gxh2
  -+  (-6.72)   Depth: 10   00:00:03  726kN
1.Kb2 Bf2 2.Nd2 Kb6 3.Bf3 c6 4.Nf1 e4 5.Bxe4 d5
  -+  (-6.72)   Depth: 10   00:00:03  1208kN
1.Kb2 Bf2 2.Kc2 Be1 3.Bh1 Bb4 4.Kd3 Bc5 5.Ke4 Bd4 6.Kd3
  -+  (-6.71)   Depth: 11   00:00:04  1762kN
1.Kb2 Bf2 2.Kc2 c5
  -+  (-6.31)   Depth: 12   00:00:06  2840kN
1.Kb2 Bf2 2.Kc2 Bd4 3.Bh1 Bg1 4.Kd3 Bf2 5.Ke4 Bd4 6.Kd5 Kb7
  -+  (-6.13)   Depth: 12   00:00:07  2840kN
1.Kb2 Bf2 2.Kc2 Bd4 3.Bh1 Bg1 4.Kd3 Bf2 5.Ke4 Bd4 6.Kd5 Kb7 7.Nxd6+ cxd6 8.Kxd6+
  -+  (-6.13)   Depth: 13   00:00:09  4538kN
1.Kb2 Bf2 2.Kc2 Bd4 3.Bh1 Bg1 4.Kd3 Bf2 5.Ke4 Bd4 6.Kd5 Kb7 7.Nxd6+ cxd6 8.Kxd6+
Kb6
  -+  (-6.11)   Depth: 14   00:00:16  8529kN
1.Kb2 Bf2 2.Kc2 Bd4 3.Bh1 Bg1 4.Kd3 Bf2 5.Ke4 Bd4 6.Kd5 Ba1 7.Bg2 Bc3 8.Nxd6
cxd6 9.Kxd6
  -+  (-6.09)   Depth: 15   00:00:28  15432kN
1.Kb2 Bf2 2.Kc2 Bd4 3.Bh1 Bg1 4.Kd3 Bf2 5.Ke4 Bd4 6.Kd5 Bg1 7.Nxe5 dxe5 8.Kxe5
Be3 9.Ke4 c5
  -+  (-5.79)   Depth: 16   00:01:02  33868kN
1.Kb2 Bd4+ 2.Kc2 Bc5
  -+  (-5.77)   Depth: 17   00:02:35  83631kN
1.Kb1 Bd4 2.Kc2 h1Q 3.Bxh1 Bg1
  -+  (-5.76)   Depth: 17   00:02:49  91568kN
1.Kb1 Bg1 2.Kc2
  -+  (-5.77)   Depth: 17   00:03:06  100294kN
1.Kb2 Bd4+ 2.Kc2 Bc5
  -+  (-5.77)   Depth: 17   00:03:06  100294kN
1.Kb2 Bd4+ 2.Kc2 Bc5 3.Bh1 Bb6 4.Ba8 Bd4 5.Bh1 Bg1
  -+  (-5.76)   Depth: 18   00:05:46  186374kN
1.Kb2 Bd4+ 2.Kc2 Bc5 3.Bh1 Bb4 4.Kd3 Be1
  -+  (-5.51)   Depth: 19   00:13:08  424894kN

(blass, tel-aviv 08.09.2002)

Uri

Re: difficult problem Gerd Isenberg 10:30:41 09/08/02
- correction and implementation hints Gerd Isenberg 05:19:04 09/09/02
  - Re: correction and implementation hints allan johnson 22:04:06 09/09/02
    - Re: correction and implementation hints Gerd Isenberg 02:58:08 09/10/02
Re: difficult problem Uri Blass 02:30:06 09/08/02
- Re: difficult problem Dieter Buerssner 14:09:34 09/08/02
- Re: difficult problem Paul 07:23:11 09/08/02
- Re: difficult problem Jim Monaghan 06:58:27 09/08/02
  - Re: difficult problem Chessfun 07:07:52 09/08/02
    - Oops! You're right Sarah. (NT) Jim Monaghan 07:17:53 09/08/02
- Re: difficult problem allan johnson 06:50:00 09/08/02

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