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Subject: Re: Two mate position to solve.

Author: William Bryant

Date: 19:17:55 09/06/00

Go up one level in this thread


On September 06, 2000 at 22:10:13, William Bryant wrote:

>On September 06, 2000 at 07:34:48, leonid wrote:
>
>>Hello!
>>
>>Please, solve this position and say how much difference your hash table did.
>>
>>Indicate any parameter of your search that you consider important.
>>
>>It is pretty normal position from the book.
>>
>> kb6/B3P3/K1P5/p7/P7/3r4//8/8 w
>>
>>My solver could not resolve it by selective search and went paintful 24 sec (AMD
>>400) before finding the mate. Mine have no hash tables. When I went to see it on
>>Rebel 10, I was impressed. His time in solving the position knew around 6 fold
>>improvement between solution without hash and with it. His hash was 28 M.
>>
>
>Screamer solves this one instantly (in debug mode running in background)
>
>Welcome to Screamer 1.00  Build 55
>Current Hash Table Size: 16384 K bytes
>Current Pawn Hash Size: 4096 K bytes
>Debug Control On
>PVS Search
>NULL move Search
>Opening Book loaded and enabled
>3 and 4 Piece Table Bases enabled
>1490 kb of Ram used for decompression tables
>1024 kb of Ram used for EGTB buffers
>
>New Board Position
>kb6/B3P3/K1P5/p7/P7/3r4//8/8 w
>Move 1 W>>
>The Current Search Time: 60 seconds
>Trying Book Move
>PLY       NODES     TIME    SCORE  PV
>__________________________________________________
> 5/00      8601     0.249      ++
> 5/00     13767     0.478 +327.38  e8=Q Rb3 Qxb8+ Rxb8 Bxb8 Kxb8
  6/00     30415     0.638 +327.58  e8=Q Rb3 Qd7 Rb6+ Bxb6 Bc7 Qc8+ Bb8 Qb7++

(left a line off sorry).

>
>William
>wbryant@ix.netcom.com



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