Author: José Carlos
Date: 19:24:15 01/24/05
Go up one level in this thread
On January 24, 2005 at 19:20:08, Uri Blass wrote:
>On January 24, 2005 at 14:53:02, Duncan Roberts wrote:
>
>>On January 24, 2005 at 12:28:21, Dieter Buerssner wrote:
>>
>>>On January 24, 2005 at 12:16:07, Duncan Roberts wrote:
>>>
>>>>after running your program overnight, I found that the nps went down a lot.
>>>>can anything be done about this ?
>>>
>>>It is because the node counter overflows. No other problem than the wrong
>>>display. And some pending questions: It is not using MTD search. I have no idea
>>>how it compares to PM (the material only versions).
>>
>>thanks for the reply. what are the values yace awards each piece (is a bishop
>>knight 3.25) and what does {HT} {-30} mean at the end of the displayed pv ?
>>
>>
>>
>>
>>duncan
>
>the values are 0.80 for pawn,3.40 for knight,3.50 for bishop,5.00 for rook
>10.01 for queen
>
>You can understand it by giving yace to analyze the following positions
>
>rnbqkbnr/1ppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>r1bqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>rn1qkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>1nbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>
>Yace find no win of material at least in a short time from these positions.
>
>Uri
>
>
>
>>
>>
>>
>>Typically Yace does not
>>>reach the same search depth as other amateur engines of comparable strength. I
>>>guess, it is doing more extensions than most other engines.
>>>
>>>Regards,
>>>DIeter
I wonder if Yace and other top amateurs use constant value for material. I,
for example, scale material differences against total material, to encourage
exchanging pieces and keeping pawns when ahead in material. So, a pawn up can be
1.20 or 1.10 with few pieces. I also modify material balance for some "teams",
like Q+N, R+B and several others. This come first, and scaling is last.
José C.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.