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Re: [Bug-gnubg] A new variance reduction technique

From: Christian Anthon
Subject: Re: [Bug-gnubg] A new variance reduction technique
Date: Tue, 31 Mar 2009 12:33:52 +0200

Without consulting the code I believe that luck-lookahed is used in
three places. Analysis (configurable), best-roll-dice (not
configurable, 0ply, cubeful?), rollout variance (not configurable,
0ply, used to be cubeless, now cubeful).


2009/3/30 Massimiliano Maini <address@hidden>:
> Michael Petch <address@hidden> wrote on 30/03/2009 16:30:24:
>> On 30/03/09 8:14 AM, "Massimiliano Maini" <address@hidden
>> > wrote:
>> 2. I'm not sure gnubg uses 2ply for luck evaluation. If it uses 0
>> ply (as I remember,
>> but I could be wrong, mabe it is 0ply just for match analysis luck
>> evals), introducing
>> your trick would cost something in terms of speed (actually, quite a
>> lot I would say,
>> knowing that each additional ply cost more or less a factor 21). If
>> somebody on gnubg
>> mailing list can confirm that ....
>> By default luck is analyzed at 0 ply. You can set the plies manually with:
>> set analysis luckanalysis plies <plies>
> Right, but is this setting acting only on the luck analysis (the luck
> adjusted
> result you see in the stats of an analyzed metch/session) or also on the
> variance
> reduction algorithm ?
> MaX.
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