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Subject: Re: passed pawn evaluation.

Author: Janos Keinrath

Date: 23:06:18 01/12/04

Go up one level in this thread


On January 12, 2004 at 10:02:07, Robert Hyatt wrote:

>On January 12, 2004 at 03:09:10, scott farrell wrote:
>
>>On January 11, 2004 at 21:18:30, macaroni wrote:
>>
>>>I have recently been fiddling arround with some passed pawn code, however I just
>>>can't seem to get it working very well. Can you give me an idea of what sort of
>>>values you give different types (in different stages) of passed pawns?
>>>cheers
>>>Tor
>>
>>I think it needs lots of knowledge.
>>
>>What I did is use several pieceSquareTables, for different types, like blocked,
>>isolated, defended, passed, connect passed (probably the most important),
>>defended passed, etc
>>
>>I then tweeked values to solve certain problems. With various psTables, you end
>>up with lots of levers to play with.
>>
>>Scott
>
>Watch out about "connected passers."
>
>give white two pawns on d2/e2.  Give black two pawns on a2/h2.  Both kings
>in the center.  Which side do you like?  :)
>
>This happens a lot vs GM players, once they see the hole.  They will
>happily give you those two connected passers.  :)
>
>Connected passers are good when you have pieces...  But with no pieces,
>look out.


[D]8/3kP3/3P4/p6p/8/8/8/4K3 w - -

Here is a tricky position for static eval,
some program's static evaluation gives very high score
for white (connected passed pawns, 6th-7th rank),
but white lost.




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