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Re: [Bug-gnubg] How strong is the lookahead?


From: Christian Anthon
Subject: Re: [Bug-gnubg] How strong is the lookahead?
Date: Mon, 30 Mar 2009 13:25:27 +0200

2009/3/30 Erez <address@hidden>:
> I wanted to know what is the true addition of the lookahead to GNU so as a
> true lamer I set out a money game session between GNU playing expert and GNU
> playing Supremo. I thought to let them play until 64 points and see Supremo
> mop the floor with expert.
> I was never able to get to 64 because the software crashed somewhere in the
> middle (happened again on another computer), but still I was very surprised
> to find out that Supremo got only about 20% more points than Expert.
> So how much stronger really is Supremo than Expert?
>

Not much I expect. The strength of the higher plies are mostly seen in
specific situations where the look-ahead is important. It is more a
question of reliability than overall strength. 64 points certainly
won't be enough to determine the difference with any confidence. The
best approach is probably to let  0ply play 0ply for a long money
session. Have supremo analyse the games for both players, and then
rollout any disagreements.  Then you'll have error rates to compare
for the two playing strengths.

Christian.

> Erez
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