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Subject: Re: Junior-Crafty hardware user experiment - 5th game

Author: Volker Pittlik

Date: 08:54:10 11/25/03

Go up one level in this thread


On November 25, 2003 at 11:01:17, Peter Berger wrote:

I can reproduce the behaviour and possibly found a workaround. Im using the same
books and Crafty 19.5.


...

>I suspect a bug in the WinBoard mode that will let it not treat the computer
>command correctly.
>
>I also have an idea what could be the reason. I don't use WinBoard in
>engine-engine mode but in Standalone mode.

Confirmed. With "computer" in the crafty.rc I got this:

show book statistics
hash table memory =   48M bytes.
pawn hash table memory =   12M bytes.
EGTB cache memory =    2M bytes.
choose from book moves randomly (using weights.)
choose from 5 best moves.
4 piece tablebase files found
threshold set to 6 pawns.
playing a computer!

...

but

...

White(1): name Volker
Crafty 19.5 vs Volker
White(1): time 18000
time remaining:   3:00 (crafty).
White(1): otim 18000
time remaining:   3:00 (opponent).
White(1): go
              clearing hash tables
  after screening, the following moves can be played
  move     played    %  score    learn     CAP     sortv   P%  P
    e4!    712147   47   0.25    -0.09    -0.07   13401.0  40  Y
    d4!    503991   33   0.25    -0.01  -655.36   13608.7  30  Y
    f4!      8908    0  -0.03     0.00  -655.36   12696.0  30  Y
   Nf3     121355    8   0.11     0.04  -655.36    5243.9   0  Y
    c4     113930    7  -0.15     0.07  -655.36    5161.0   0  Y

What is not the expected behaviour IMHO.

Workaround:

After Winboard is started press "Alt+1" at the keyboard at enter "computer"
manually. Here I got the following result after doing so:

White(1): bk
White(1): computer
playing a computer!
White(1): name Volker
Crafty 19.5 vs Volker
White(1): time 18000
time remaining:   3:00 (crafty).
White(1): otim 18000
time remaining:   3:00 (opponent).
White(1): go
              clearing hash tables
  after screening, the following moves can be played
  move     played    %  score    learn     CAP     sortv   P%  P
    d4!    503991   33   0.25    -0.01  -655.36   13608.7  50  Y
    e4!    712147   47   0.25    -0.09    -0.07   13401.0  50  Y
   Nf3     121355    8   0.11     0.04  -655.36    5243.9   0  Y
    c4     113930    7  -0.15     0.07  -655.36    5161.0   0  Y
    h3?       166    0  -0.18     0.61  -655.36    4346.2   0  N
    d3?       809    0   0.22     0.28  -655.36    2684.6   0  N
    g3?     11758    0  -0.17     0.21  -655.36    1872.5   0  N
    b3?      5794    0  -0.17     0.12  -655.36    1301.6   0  N
    b4?      8778    0  -0.14     0.10  -655.36    1210.8   0  N
    e3?      1651    0   0.22    -0.01  -655.36     873.3   0  N
   Nc3?      4144    0   0.11     0.00  -655.36     829.3   0  N
   Nh3?       110    0   0.01     0.00  -655.36     723.7   0  N
   Na3?        74    0   0.01     0.00  -655.36     723.6   0  N
    f4?      8908    0  -0.03     0.00  -655.36     696.0   0  N
    f3?       162    0  -0.06     0.00  -655.36     653.7   0  N
    g4?      1237    0  -0.14     0.00  -655.36     575.2   0  N
    c3?       391    0  -0.18     0.00  -655.36     534.0   0  N
    h4?       161    0  -0.15    -0.02  -655.36     438.7   0  N
    a3?       599    0  -0.18    -0.04  -655.36     284.3   0  N
    a4?       167    0  -0.15    -0.07  -655.36     126.2   0  N
               book moves {d4, e4}
               moves considered {d4, e4}
  move     played    %  score     sortv  P%  P
    d4!    503991   33   0.25   50000.0  50  Y
    e4!    712147   47   0.25   50000.0  50  Y
               book   0.0s     33%    d4! Nf6
White(1): d4
              time used:   0.21


What looks much better IMHO.

Regards

Volker



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