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Subject: Re: mate threat extension/null move

Author: Dan Honeycutt

Date: 11:51:16 09/29/04

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On September 29, 2004 at 14:16:23, Stuart Cracraft wrote:

[snip]
>
>WAC 141 takes me a shade over 24,000,000 nodes, a fully completed 7 ply search,
>to find Qxf4 with all the above improvements, still the same amount of
>time as without:
>
>Alpha=-1332 Beta=-532 Maxdepth=9999999 MaxTime=1410065407
> 1/11  g2f1  0.00 -953      945 g2f1 f4d5
>                                g2f1 f4d5
> 2/12  g2f1  0.01 -953     1653
>                                g2f1 f4d5 c1g5
> 3/12  g2f1  0.02 -953     5073
>                                g2f1 f4d5 c1g5 d5f6
> 4/20  g2f1  0.09 -953    19924
>                                g2f1 f4d5 b3d5 c6d5 c1c7 d6c7 f1g1
> 5/22  g2f1  0.71 -953   170357
>                                g2f1 b5b4 b3a4 f4d5 f6g5 d5e7
> 6/26  g2f1  2.85 -953   617222
>                                g2f1 b5b4 mtmt
> 7/32> g2f1 56.60 -553 13644478 g2f1 e8c8 c1b1 f4d5 b1e4 d6b4 f6e5 c7b6
>                                g2f1 e8c8 c1b1 f4d5 b1e4 d6b4
> 7/34  c1f4 97.33 5113 24161497 c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 d6e7 f6e7
>                                c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1
> 8/34  c1f4 115.59 5113 27838968
>                                c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1
> 9/34> c1f4 197.37 5513 48705672
>                                c1f4 e8e6 f4g5 d7e7 b3e6 e7e6 h1d1 mtmt
> 9/... still searching
>
>Stuart

Doesn't look like the program has actually found Qxf4.  e8e6 is not the next
move.

Dan H.



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