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Subject: Re: maxDTZ limit

Author: Uri Blass

Date: 21:40:04 10/17/05

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On October 18, 2005 at 00:32:42, GuyHaworth wrote:

>
>A question Mark has posed himself is [I paraphrase somewhat]:
>
>"For what number of men is the 'DTZ' depth maximised?"
>
>He suggested it might have peaked with the maxDTZ = 243 for KRNKNN but we now
>see that this is not the case.  I see no particular reason why KRRNKRR exhibits
>the maxDTZ for 7-men either, One might conjecture that there would be no Pawns
>on the board as a Pawn-advance sets the move-count back to zero, but KNNKP is a
>5-man counter-example.
>
>According to the endgame stats, available at www.icga.org, maxDTZs are:
>
>  #-men    P-less   maxDTZ    P-ful   maxDTZ    Notes
>
>  3        KRK       16       KPK      10
>  4        KBNK      33       KQKP     26
>  5        KBNKN     77       KNNKP    82
>  6        KRNKNN   243       ??                P-ful EGTs not available
>
>  7        KRRNKRR  290       ??                ... so far
>
>Note that DTZ is "Depth to [move-count] Zeroing move" and not DTM which is
>"Depth to Mate" or DTC which is "Depth to Conversion [i.e. capture and/or
>conversion and/or mate]".
>
>g

I do not understand the difference between DTC and DTZ
What is the difference between Zeroing move and conversion.

Does conversion mean only capture or mate or promotion without pawn moves?
I thought that conversion means every move that zero the 50 move counter.

Uri



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