RE: [Bug-gnubg] Re: Naw..panic or teach me what I am doing wrong !!

[Albert Silver]

Have you tried the exact same settings except with cubeful ON?

                                Albert

> -----Original Message-----
> From: address@hidden [mailto:bug-gnubg-
> address@hidden On Behalf Of Joseph Heled
> Sent: Thursday, January 09, 2003 6:44 PM
> To: Joern Thyssen
> Cc: gnubg; Gary Wong
> Subject: Re: [Bug-gnubg] Re: Naw..panic or teach me what I am doing
wrong
> !!
> 
> but now it gives me strange results. The difference seems to be when
> using (or not using) the truncation. Can you try those 2
> 
> set rollout bearofftruncation exact off
> set rollout bearofftruncation onesided off
> set rollout quasirandom off
> 
> set analysis chequerplay rollout cubeful off
> set analysis chequerplay rollout varredn off
> set analysis chequerplay rollout quasirandom on
> 
> set rollout trials 144
> set rollout seed 1
> 
> new game
> set board 2LYBCDPOewMAAA
> rollout
> 
> 
> 
> And
> 
> et rollout bearofftruncation exact on
> set rollout bearofftruncation onesided on
> set rollout quasirandom off
> 
> set analysis chequerplay rollout cubeful off
> set analysis chequerplay rollout varredn off
> set analysis chequerplay rollout quasirandom on
> 
> set rollout trials 144
> set rollout seed 1
> 
> new game
> set board 2LYBCDPOewMAAA
> rollout
> 
> 
> I get wildly different results. Perhaps the evaluation somewhere else
is
>    wrong?
> 
> Joern Thyssen wrote:
> > On Fri, Jan 10, 2003 at 10:06:29AM +1300, Joseph Heled wrote
> >
> >>I think I found the bug, but I would like an opinion because I can't
> >>believe such a blatant error can exist undetected for so long.
> >>
> >>I think wins are logged to the wrong player in the rollout code,
when
> >>the game is over.
> >>
> >>line 747 in rollout.c
> >>
> >>      if ( iTurn & 1 ) InvertEvaluationR ( aarOutput[ ici ], pci );
> >>
> >>If I change it to
> >>
> >>      if ( ! (iTurn & 1) ) InvertEvaluationR ( aarOutput[ ici ], pci
);
> >>
> >>I start to get exactly my numbers again.
> >
> >
> > It think it's close enough: actually the bug appears to be that the
> > evaluation just preceding that is evaluated for the wrong player on
> > roll --- but your fix is equivalent, as we only end up there if the
game
> > is over, in which case it doesn't matter who's on roll.
> >
> > Jørn
> >
> >
> 
> 
> 
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