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Subject: Re: Pawn structure evaluation only?

Author: Tim Foden

Date: 01:42:11 03/13/05

Go up one level in this thread


On March 12, 2005 at 12:08:51, David Dahlem wrote:

>Are there any available engines which can analyze a position and display a score
>for the pawn structure evaluation?
>
>Thanks
>Dave

Crafty can do this...

EPD Kit revision date: 1996.04.21
unable to open book file [./books.bin].
book learning disabled
result learning disabled
position learning disabled
pondering disabled.


Crafty v17.11

White(1): setb 8/6p1/8/3k3p/1b2pKPP/8/8/2B5 b - - 1 50
Black(1): sc
end-game phase
              clearing hash tables
note: scores are for the white side
material evaluation.................  -1.00
development.........................   0.00
pawn evaluation.....................  -0.38
passed pawn evaluation..............   0.00
passed pawn race evaluation.........   0.00
king safety evaluation..............   0.00
interactive piece evaluation........  -0.22
total evaluation....................  -1.60
Black(1):



GLC can also, but it puts out a lot more info too...

Green Light Chess
Version 3.01.2.4
Copyright (c) 2000-2004 by Tim Foden; All Rights Reserved.
Logging output to file "glc301.2.4.log"
Evaluation values loaded successfully.
 Console is a TTY
Hash table size is 8.0MB
Opening book "primary.hbk" contains 31911 positions
 Generated internal KK DTM end-game table (0.000 secs)
 Generated internal KNK DTM end-game table (0.020 secs)
 Generated internal KBK DTM end-game table (0.020 secs)
 Generated internal KRK DTM end-game table (0.120 secs)
 Generated internal KQK DTM end-game table (0.100 secs)
 Generated internal KPK DTM end-game table (0.231 secs)
>fen 8/6p1/8/3k3p/1b2pKPP/8/8/2B5 b - - 1 50

   abcdefgh      Black to play
  +--------+
 8|░ ░ ░ ░ |8      1...
 7| ░ ░ ░p░|7    ---- ------- -------
 6|░ ░ ░ ░ |6
 5| ░ k ░ p|5
 4|░b░ pKPP|4
 3| ░ ░ ░ ░|3
 2|░ ░ ░ ░ |2
 1| ░B░ ░ ░|1
  +--------+
   abcdefgh

>sc
 Game stage: Endgame
       b pawn (e4) passed                          407
       b pawn (e4) isolated                       -104
 w pawn (g4) singly connected                 20
 w pawn (h4) singly connected                 20
 w pawn (h4) weak                            -97
       b pawn (h5) singly connected                 20
       b pawn (e4) passed outside left             100
       b pawn (e4) passed supported                121
       b pawn (e4) bishop promote sq                59
 *** king safety:          white:  0.000  black:  0.000
 w pawn (g4) static eval                      75
 w pawn (h4) static eval                    -125
 w pawn (h4) blocked                         -60
       b pawn (g7) static eval                      25
       b pawn (h5) static eval                    -125
       b pawn (h5) blocked                         -60
       b pawn (e4) static eval                     100
 w bishop (c1) with pawns endgame             99
 w bishop (c1) attack bonus                    1
       b bishop (b4) mobility bonus                 65
       b bishop (b4) with pawns endgame             99
 w king (f4) static eval                      75
 w king (f4) with pawns bonus                 23
       b king (d5) static eval                     100
       b king (d5) with pawns bonus                 23
 *** positional (white): P=-0.110 N= 0.000 B= 0.099 R= 0.000 Q= 0.000 K= 0.098
 *** positional (black): P=-0.060 N= 0.000 B= 0.164 R= 0.000 Q= 0.000 K= 0.123
 *** positional:           white:  0.087  black:  0.227
 *** attack bonus:         white:  0.010  black:  0.000 (1 0)
 *** attack defects bonus: white:  0.000  black:  0.000 (1*0 0*0)
 *** general attack bonus: white:  0.000  black:  0.000
 *** final:                white:  0.097  black:  0.227
 ============================
    material (w): -1.000
 pawn struct (w): -0.660
 king safety (w):  0.000
 ============================
 Score (black) 1.790
>

I'm sure that there are probably others.

Cheers, Tim.




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