I am not sure what you mean by "sigmoid has changed" but any change to the way it is evaluated means the net will suffer - it is not recommended without re-training.
-Joseph On Tue, Sep 1, 2009 at 7:24 AM, Michael Petch <[email protected]>wrote: > > > On 31/08/09 1:09 PM, "[email protected]" > <[email protected]> wrote: > > > Hi Michael > > I'm almost certain the problem arises when at the 2-ply stage gnubg > thinks the > > move is an error it simply references the 0-ply evals but reports them as > > 4-ply. > > > > This would explain why it takes longer with pruning on than off. > > > > The problem doesn't occur when the move played is the best move at 2-ply. > > > > Gnubg then reports the correct 4-ply evals. > > > > I've checked quite a few positions and they all confirm my findings. > > > I am CC'ing this back to the list to provide others that information. > > > On a separate note I'm using build Aug 3 2007 because I can't get the > latest > > build to stop crashing. I noticed a lot of the times the evals will > differ but > > I've never seen more than 0.001. Do you know why that is? > > > > With regards to the crashing. What happens if you remove gnubgautorc (make > a > backup somewhere else) from the .gnubg directory (Its a subfolder of your > home directory), and then reenter all of your settings. Does it crash? If > it > continues to crash, what are you doing when it does crash? > > As for evals being different, yes there is a reason. Since 2007 we have > added two things. SSE vector support. This changed the evals slightly. More > recently we added SSE2 vector support and a new sigmoid function in the > neural net. The evals will be slightly different yet again. Since 2007 > there > have been a number of bug fixes, some of which may alter rollout results as > well. > > You can not rely on evaluations to always be the same from release to > release. When you install Gnugb there is a file installed called Changelog. > It contains a list of the bigger changes that have been committed (and the > date). > > Michael > > > > > _______________________________________________ > Bug-gnubg mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/bug-gnubg >
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