Author: Ed Schröder
Date: 02:23:01 10/10/99
Go up one level in this thread
>Posted by Harald Faber on October 10, 1999 at 03:22:13: > >In Reply to: PB-ON vs PB-OFF (results experiment-1) posted by Ed Schröder >on October 10, 1999 at 03:14:10: > >On October 10, 1999 at 03:14:10, Ed Schröder wrote: > >>PB-ON vs PB-OFF (results experiment-1) >> >>To enrich the discussion about the value of the "Permanent Brain" (PB) I >>have started 2 experiments with Rebel Century (RC) which will give some >>data for a better judgement. >> >>Experiment-1: >>RC (PB=ON) vs RC (PB=OFF) >>100 auto232 games >>Time control: 60 secs average. >>Hardware: 4xPII-266 + 2xPII-450 >>Result: 61-39 >> >>Experiment-2: >>RC (PB=ON) vs RC (PB=OFF) >>100 auto232 games >>Time control: RC (PB=ON) 30 sec average >>Time control: RC (PB=OFF) 60 sec average >>Hardware: 4xPII-266 + 2xPII-450 >>Status: in progress >> >>Ed Schroder > >Sorry Ed, but where is the sense in it? Is there any difference than playing >Rebel10-Rebel9 which is also meaningless? >Would you expect a result of 50-50 when both playing PB=on or both PB=off? I >wouldn't. >I think the most interesting idea is to take Rebel+PB=on against another >program >with PB=on and as comparison play the same match with both PB=off. Of >course you >can extend this to Rebel+PB-vs-Opp X PB=off and Rebel PB=off vs Opp X PB=on. > >But Rebel vs Rebel, sorry, there is really no sense in it. I think you missed the discussion of the value of the PB. There are many who believe the PB is only worth 20-40 elo points. I believe this is not true and so I started these 2 experiments. I believe the value of the PB is worth AT LEAST 50 elo points but most probably 100 elo and I wouldn't be surprised if it will be higher. Now you can argue about playing Rebel-Rebel as a base. The big advantage playing Rebel-Rebel is 2 ways: a) you have a 100% equal opponent which is of course very important b) using Rebel you can turn off all learning to avoid any unwanted side effects for the experiment. The only disadvantage I see is that most probably the percentage of the predicted moves will be a bit higher than the average you get playing ALL other programs. Note that Rebel (or any other program) will have a different percentage of predicted moves against another opponent. Rebel may predict 40% against Crafty, 75% against Hiarcs and 20% against Fritz or vice versa. Who knows? Thus picking another program as a base is flawed also. Again: this is only about the ELO of the PB valid for Rebel. The difference in ELO might fluctuate for each other program. Ed
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