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Subject: Re: One-reply extension howto

Author: Robert Hyatt

Date: 21:09:25 03/03/03

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On March 03, 2003 at 20:19:50, Sune Fischer wrote:

>
>>>Do you save it in hash so next time you know, or what..?
>>
>>You can certainly do that.  I think DT/DB did...  I did in Cray Blitz.  I don't
>>now
>>since I generate moves when in check anyway and then use the hash move to pick
>>the best of the out-of-check moves, so I already know it is a one-move case or
>>not.
>
>What if you fail low, do you still save the move or do you store 0 as usual?
>If you stored a flag indicating one move only, you wouldn't need to do check
>evasion the second time round.

I don't do that, but it could possibly save time, as you suggest.

As far as fail low goes, yes.  store a 0 move as there is no best move in
such a case.



>
>In fact if you probe before you incheck, you could even store an incheck flag,
>saving you the incheck call entirely. Flags are cheap you know, at one bit only
>:)
>
>-S.


Probably worth doing, although in the middlegame the hash hits are not real
frequent, but it would certainly be worthwhile...



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