Re: [Bug-gnubg] GnuBG faring poorly in back games

[Rod Roark]

Here's a cute example.  GnuBG evaluates its chances here at
99.80%(!!).  Yet of course it lost.  Movefilters are as in
my previous message below.

 GNU Backgammon  Position ID: AADgfzvYth0IAg
                 Match ID   : BIH0AQAAAAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg (Cube: 16)
 |          O  O  O |   | O  O  O  X  X  X |     0 points
 |          O  O  O |   | O  O  O  X  X  X |     Rolled 15
 |          O       |   |          X     X |
 |                  |   |          X       |
 |                  |   |          A       |
^|                  |BAR|                  |     15 point match
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |
 |       O          |   |    O             |     0 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: rod

(gnubg) hint 1
    1. Cubeful 2-ply    15/9                         MWC:  99.80%
       0.998 0.979 0.774 - 0.002 0.000 0.000
        2-ply cubeful prune [world class]

-- Rod

On Friday 03 June 2005 10:54 am, Rod Roark wrote:
> Aha!  I had taken out my narrow movefilters on installing
> the new gnubg because it was plenty fast without them.  If
> I put them back in, it now says 2-ply again.  They are:
> 
>   set evaluation movefilter 1 0  0 8 0.120000
>   set evaluation movefilter 2 0  0 8 0.120000
>   set evaluation movefilter 2 1 -1 0 0.000000
>   set evaluation movefilter 3 0  0 8 0.120000
>   set evaluation movefilter 3 1 -1 0 0.000000
>   set evaluation movefilter 3 2  0 2 0.030000
>   set evaluation movefilter 4 0  0 8 0.120000
>   set evaluation movefilter 4 1 -1 0 0.000000
>   set evaluation movefilter 4 2  0 2 0.030000
>   set evaluation movefilter 4 3 -1 0 0.000000
> 
> What does this tell us?
> 
> -- Rod