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Subject: Re: Shredder 8 with nonsense mate in 153 announcement

Author: Harald Faber

Date: 01:17:37 01/17/04

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On January 17, 2004 at 02:47:10, Russell Reagan wrote:

>On January 16, 2004 at 19:06:21, Harald Faber wrote:
>
>>
>>[D]2r1k1b1/pp4Q1/3p4/q5p1/4P3/1PN2P2/PP6/1K5R b - - 0 1
>>
>>Analysis by Shredder 8:
>>
>>1. +- (#153): 33...Lf7 34.Th8+ Ke7 35.Txc8 d5 36.Sxd5+ Kd6 37.Dxf7 De1+ 38.Tc1
>>Dc3 39.bxc3 b5 40.Dxa7 Kc6 41.Dc7#
>>2. +- (#151): 33...Tc7 34.Dxg8+ Kd7 35.Sd5 Tc2 36.Th7+ Kc6 37.Dc8+ Dc7 38.Txc7+
>>Kb5 39.Kxc2 a5 40.Dxb7#
>>3. +- (#7): 33...De5 34.Dxg8+ Kd7 35.Th7+ De7 36.Txe7+ Kxe7 37.Dxc8
>
>That probably just means it found forced mate, but the real depth is not known.


I disagree. The forced mate is shown in the line. Therefore it should be easy to
only count the number of moves. I don't think that #153 is just a fancy mate
announcement just to show "there is a mate!". I think Stefan, Sandro or Helmut
can enlighten us.


>I know Ruffian announces mate in 500 sometimes :-) The programmer just chose
>some value that was close to the value representing for checkmate to represent a
>mate of unknown depth.


Some positions before there appeared #150 sometimes, this could be a hint. :-)



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