Author: Marc Bourzutschky
Date: 03:27:19 02/04/03
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On February 04, 2003 at 00:23:29, Helmut Conrady wrote: >On February 03, 2003 at 22:04:06, Marc Bourzutschky wrote: > >>On February 03, 2003 at 20:17:31, GuyHaworth wrote: >> >>> >>>Anyone know anything about this small problem...? >>> >>>I'm looking at some deep KQPKQ positions with Fritz6 and EN's EGTB. >>> >>>On White-to-move, there is no problem: I see the position's DTM depth. >>> >>>For Black to move, sometimes I see the DTM and sometimes I see instead an >>>'evaluation' to 2 decimal places. Behaviour is consistent: either the btm >>>position shows depth correctly, or shows the spurious 'eval number'. >>> >>>The KQPKQ EGT has been down-loaded twice: no difference. >>> >>>My Fritz6 has not been updated since bought some years ago: are there any >>>update packages? >>> >>>Fritz loads ok - which it doesn't do (afaik) if the EGTB is corrupted in some >>>way. >>> >>>Thanks in advance ... guy >> >>Make sure you have all the relevant subgames. For example, if you don't have >>KQPK the machine might think it can "improve" on getting mated by sacrificing >>its queen for a large negative score. >> >>-Marc > >In Shredder 7 or or Fritz 8 this problem is "fixed". When i.e. one move before a >conversion some subendgames are missing the engines do a "normal" search. > >Helmut The normal search may precisely be Guy's problem, because in general it would return a numerical evaluation rather than a mate score.
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