Re: Bug in rollout ?

2020-09-23 Thread Øystein Schønning-Johansen
Thanks, I think you are spot on, Philippe. (And so i Theo) Easy for me does not imply that it is easy for the neural network. -Øystein On Wed, Sep 23, 2020 at 10:27 PM Philippe Michel wrote: > On Wed, Sep 23, 2020 at 06:22:28PM +0200, Øystein Schønning-Johansen wrote: > > > I strongly believe

Re: Bug in rollout ?

2020-09-23 Thread Philippe Michel
On Wed, Sep 23, 2020 at 06:22:28PM +0200, Øystein Schønning-Johansen wrote: > I strongly believe that this is a pretty simple position to play For a neural net this is not so clear. With 7 men stacked on the 7 point this is a position that will never happen in real play and is unlikely in

Re: Bug in rollout ?

2020-09-23 Thread Joseph Heled
The 0ply sees a sure win for O with no gammons, and plays a random move basically. Let's hope the race net can be improved once again :) (maybe you can check previous nets to see if that was always the case ...) -Joseph On Thu, 24 Sep 2020 at 06:51, Øystein Schønning-Johansen wrote: > Yes,

Re: Bug in rollout ?

2020-09-23 Thread Øystein Schønning-Johansen
Yes, Theo, I think you might be right. I actually turned on game logging and re-ran the rollout. I noticed that GNU Backgammon really plays the bearin really really bad. Look at the attached games: I just picked some games at random, and these two games really show awful playing. Can anyone

Re: Bug in rollout ?

2020-09-23 Thread Theodore Hwa
2% seems more like the correct number. I think the first rollout is the wrong one. A naive analysis: X looks virtually certain to get a piece off within 5 rolls, which means that O has to win in 4 rolls for a gammon. Since O has 13 pieces left, this means O has to roll doubles in 3 of the

Bug in rollout ?

2020-09-23 Thread Øystein Schønning-Johansen
Hi all! I'm trying to rollout a position as cubeless moneygame. I think I see a bug in GNU Backgammon. So here is my position: GNU Backgammon Position ID: 960BAMCw+0MAAA Match ID : cAkA +13-14-15-16-17-18--19-20-21-22-23-24-+ O: gnubg | |