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Subject: Re: Easy mate to solve...

Author: Tim Foden

Date: 01:33:44 03/05/01

Go up one level in this thread


On March 04, 2001 at 16:56:43, leonid wrote:

>Hi!
>
>If you want to solve one mate that is not difficult, then this is for you:
>
>[D]qNqkqNq1/1QqbqQB1/1qBR1q2/nQ1q1Qn1/1NNRNN2/1r3r2/3b4/3K4 w - -
>
>Please, indicate your result.
>

Green Light Chess finds the same mate in 8 as was previously reported.
It doesn't find anything shorter, but then I didn't let it search very
long.

Cheers, Tim.

Analysis... GLC v2.13, 920MHz Duron, 48Mb hash:

>hash 48
 Hash table size set to: 48.0MB
>anal
 Game stage: Opening
 Current eval: -36.69
 Ply  Time  Score   Nodes  Principal Variation
  1   0.01 -36.60    1133  N4e6+ Nxe6
  1   0.01     ++    3002  N8e6+   (a=-37.19 b=-36.19 e=-36.19)
  1   0.02 -35.64    3956  N8e6+ Nxe6
  1   0.02 -26.33    4812  Nbxd5  >
  1   0.03 -26.26    6178  Nxf65  >
  1   0.04 -26.23    7727  Nfxd5  >
  1   0.07 -23.15   13440  Qxc8+ Kxc8 Qxe8+ Qxe8 Nxb6+ Qxb6
  1   0.08 -22.56   17058  Qxc7+ Qbxc7 Qxe8+ Kxe8 Bxd7+ Kd8
  1   0.10 -22.43   22063  Qxe8+ Kxe8 Qxc8+ Qxc8 Bxd7+ Kf7
  1   0.10 -22.43   22690  Qxe8+ Kxe8 Qxc8+ Qxc8 Bxd7+ Kf7
  2   0.11     ++   23136  Qxe8+   (a=-22.93 b=-21.93 e=-21.93)
  2   0.15 -15.90   31471  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Qxf6 Bxd7+ Kd8
  2   0.18 -15.90   43510  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Qxf6 Bxd7+ Kd8
  3   0.21     ++   46502  Qxe8+   (a=-16.40 b=-15.40 e=-15.40)
  3   0.28  -5.95   74870  Qxe8+ Kxe8 Qxc8+ Kf7 Qbxd5+ Ne6 Qxf6+ Qxf6 Nxb6
  3   0.44  -5.95  165758  Qxe8+ Kxe8 Qxc8+ Kf7 Qbxd5+ Ne6 Qxf6+ Qxf6 Nxb6
  4   0.48     ++  168878  Qxe8+   (a=-6.45 b=-5.45 e=-5.45)
  4   0.73   3.72  310948  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Qxc7+ Kxc7
                             Nbxd5+ Qxd5 N4xd5+ Kxb8
  4   1.56   3.72  806540  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Qxc7+ Kxc7
                             Nbxd5+ Qxd5 N4xd5+ Kxb8
  5   1.58     ++  813077  Qxe8+   (a=3.22 b=4.22 e=4.22)
  5   2.07 320.85 1206702  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  5   5.20 320.85 3861171  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  6   7.72 320.85 5660844  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7#
  6  19.83 320.85  15923k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7#
  7  28.17 320.85  23098k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  7   1:19 320.85  64838k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  8   1:44 320.85  87257k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  8   4:53 320.85 248169k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  9   6:15 320.85 321758k  Qxe8+ Kxe8 Qxc8+ Qxc8 Nxf6+ Kd8 Qxb6+ Qc7 Rxd7+
                             Qexd7 Qxd7+ Qxd7 Rxd7+ Kc8 Qxc7# <ht>
  9  12:04   6/78          Qxc7+  >exit
 local:  t=12:05  nps=877716.6  n=636794808  (f=129705581  q=507089227)
 total:  t=54:49  nps=642145.9  n=2112326086  draws=25108
 trans:  probes=58202688  hits=5097967 (8.76%)  draft=2754744 (4.73%)
 tcuts:  exact=265 (0.00%)  upper=1086482 (1.87%)  lower=1664829 (2.86%)
 tstor:  exact=279 (0.00%)  upper=21404434 (67.22%)  lower=10438302 (32.78%)
 ext:  check=65449472  recap=3126050  ppush=0  1rep=732662  thrt=0
 q-moves:  gen=2095400  tested=218208  made/un=90425  max-dep=9
 max eval diff:  part-1=1.56  part-2=1.57
>hash 6
 Hash table size set to: 6.0MB





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