Author: Tim Foden
Date: 02:46:15 01/25/05
Go up one level in this thread
On January 24, 2005 at 17:36:21, Eric Oldre wrote:
>I'm interested in knowing which free engines will give you a static
>evaluation. (I think that is the term)
>
>ie. given a position, what score would the eval function return for
>this position. NOT doing any search.
>
>in addition, if the program allows you see a breakdown of how it arrived
>at that score that would be even better.
>
>ie
>material 100
>kingsafe 34
>mobility -30
>pawns -68
>
>etc
>
>I'd like to use this to get better ideas on how to improve Latista's King-safety
>and other evaluation terms. But since I'm not that good of a chess player
>myself it helps to have programs to compare to.
>
>Thanks,
>Eric
GreenLight has this ability.
E.g. if you start GLC in command line mode, you can do this:
Green Light Chess
Version 3.01.2.2
Copyright (c) 2000-2004 by Tim Foden; All Rights Reserved.
Logging output to file "glc301.2.2.log"
Information: Failed to open file: glc301.2.2.eval
-- Default evaluation values will be used.
Console is a TTY
Hash table size is 8.0MB
Opening book "primary.hbk" contains 31911 positions
>fen r2q1rk1/1p2bpp1/p1b2n1p/8/5B2/2NB4/PP1Q1PPP/3R1RK1 w
abcdefgh White to play
+--------+
8|r ░q░rk |8 ---- ------- -------
7| p ░bpp░|7
6|p b ░n░p|6
5| ░ ░ ░ ░|5
4|░ ░ ░B░ |4
3| ░NB ░ ░|3
2|PP░Q░PPP|2
1| ░ R RK░|1
+--------+
abcdefgh
>sc
Game stage: Opening
w pawn (a2) singly connected 20
w pawn (b2) singly connected 20
w pawn (f2) singly connected 20
w pawn (g2) doubly connected 35
w pawn (h2) singly connected 20
b pawn (a6) singly connected 20
b pawn (h6) singly connected 20
b pawn (b7) singly connected 20
b pawn (f7) singly connected 20
b pawn (g7) doubly connected 35
eval: white safety 0.000 (wdef 0, bmat 31518)
eval: black safety -0.030 (bdef 1, wmat 31518)
*** king safety: white: 0.000 black: -0.030
development 130 (0 30)
w pawn (b2) static eval 5
w pawn (f2) static eval 10
w pawn (g2) static eval 5
b pawn (g7) static eval 5
b pawn (f7) static eval 10
b pawn (f7) blocked -80
b pawn (b7) static eval 5
b pawn (h6) static eval 10
b pawn (a6) static eval 10
w knight (c3) static eval 19
w knight (c3) mobility bonus 40
b knight (f6) static eval 21
b knight (f6) mobility bonus 60
w bishop (d3) static eval 21
w bishop (d3) attack bonus 1
w bishop (f4) static eval 40
w bishop (f4) attack bonus 1
b bishop (e7) static eval -1
b bishop (c6) static eval 20
b bishop (c6) attack bonus 3
w rook (d1) static eval 40
w rook (d1) open file 167
w rook (d1) rank mobility 29
w rook (f1) static eval 19
w rook (f1) rank mobility -3
w rook (f1) attack bonus 3
b rook (f8) static eval 19
b rook (f8) rank mobility -3
b rook (f8) attack bonus 3
b rook (a8) rank mobility 10
w queen (d2) static eval 81
w queen (d2) attack bonus 1
b queen (d8) static eval -1
b queen (d8) attack bonus 1
w king (g1) static eval 51
w king (g1) with pawns bonus 69
b king (g8) static eval 51
b king (g8) with pawns bonus 46
*** positional (white): P= 0.020 N= 0.059 B= 0.061 R= 0.252 Q= 0.081 K= 0.120
*** positional (black): P=-0.040 N= 0.081 B= 0.019 R= 0.026 Q=-0.001 K= 0.097
*** positional: white: 0.593 black: 0.182
*** attack bonus: white: 0.080 black: 0.100 (6 7)
*** attack defects bonus: white: 0.006 black: 0.000 (6*1 7*0)
*** pressure combo bonus: white: 0.100 black: 0.050 (2 1, 1 1)
w bishop (d3) bishop with bishop 257
b bishop (e7) bishop with bishop 257
*** final: white: 1.036 black: 0.589
============================
material (w): 0.000
pawn struct (w): 0.000
king safety (w): 0.030
============================
Score (white) 0.607
>
I'm not sure the values are any good though! :)
Cheers, Tim.
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