Re: [Bug-gnubg] Bug#659494: Resigns more points than necessary when fewer points would still result in opponent win

[Joseph Heled]

Apply my argument again:) The bot should roll, then resign.

(I am not saying how hard or easy it is to do in gnubg, but just what
makes sense for a bot)

-Joseph

On 15 February 2012 11:47, Michael Petch <address@hidden> wrote:
> On 14/02/2012 3:32 PM, Joseph Heled wrote:
>> if the bot does not care about points lost, it should resign, no?
>>
> In the case I showed yes, the bot would have already resigned. But in my
> example I used it as a "edit position" and asked the bot to tell me what
> it should do with the play. Although outside a complete match. My
> example may not have been the best one. A better example is probably
> this one:
>
>    GNU Backgammon  Position ID: CgAA2Lo7AAACAA
>                    Match ID   : 8AlgAaAAAAAA
>    +24-23-22-21-20-19------18-17-16-15-14-13-+  O: mpetch
> OOO |    O  O          |   |                  |  10 points
> OOO |                  |   |                  |
> OOO |                  |   |                  |
>  OO |                  |   |                  |
>  OO |                  |   |                  |
>    |                  |BAR|                  |v 11 point match (Cube: 1)
>    |                  |   |                  |
>    |                  |   |                  |
>    |          X  X  X |   |                  |
>    | X  X     X  X  X |   |                  |  On roll
>    | X  X  X  X  X  X | X |                  |  0 points
>    +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: gnubg
>
>    1. Cubeful 2-ply    bar/15 6/1(2)                MWC:   0.000%
>       0.0000 0.0000 0.0000 - 1.0000 0.9830 0.0000
>        2-ply cubeful prune [world class]
>    2. Cubeful 2-ply    bar/20 6/1(3)                MWC:   0.000% (
> 0.000%)
>       0.0000 0.0000 0.0000 - 1.0000 0.9830 0.6944
>        2-ply cubeful prune [world class]
>    3. Cubeful 2-ply    bar/5                        MWC:   0.000% (
> 0.000%)
>       0.0000 0.0000 0.0000 - 1.0000 0.8981 0.0000
>        2-ply cubeful prune [world class]
>    4. Cubeful 2-ply    bar/10 6/1                   MWC:   0.000% (
> 0.000%)
>       0.0000 0.0000 0.0000 - 1.0000 0.9830 0.0000
>        2-ply cubeful prune [world class]
>
>
>
> The Bot had a chance to win before the roll, but not after. In this case
> it happens that it plays bar/15 6/1(2). It doesn't save the gammon, and
> on next roll the bot will resign. It could have saved the gammon but it
> didn't. Apply same argument from my original position to this.
>
> --
> Michael Petch
> CApp::Sysware Consulting Ltd.
> OpenPGP FingerPrint=D81C 6A0D 987E 7DA5 3219 6715 466A 2ACE 5CAE 3304