Author: Thorsten Greiner
Date: 04:10:15 05/18/00
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On May 18, 2000 at 06:58:44, Jan Pernicka wrote: > Hi, >I have to face this problem: > When using aspiration search at the root with window <eval-100,eval+100> I >occasionally get fail high - for example when I have found a mate. Problem >is when the returned score (let's call it S)is actually the exact value of my >position - in this case I do a research with window <S,+infinity> but Research with <S-1, +infinity>. At least that is what crafty does. In my program I just fetch the PV from the transposition table. Like Diep does (Hi Vince!). >I'm unable to set PV properly at that ply - and if it's last ply of the search >PV is wrong... (e.g. showing PV not leading to mate even though returned score >says it will be mate...). > I set the PV in the tree when: > 1) I got cutoff > 2) eval()>alfa >Thank you in advance for your suggestions. > Jan
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