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Subject: Re: Two mate position to solve.

Author: William Bryant

Date: 19:10:13 09/06/00

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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

William
wbryant@ix.netcom.com



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