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

Author: Harald Faber

Date: 15:10:44 01/17/04

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On January 17, 2004 at 12:45:30, Christophe Theron wrote:

>On January 17, 2004 at 07:59:09, Harald Faber wrote:
>
>>On January 17, 2004 at 06:07:33, Ed Schröder 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
>>>
>>>Harald,
>>>
>>>Can you proof your claim?
>>>
>>>Ed :)
>>
>>Sure.
>>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# is #8, not #153
>>
>>33...Tc7 34.Dxg8+ Kd7 35.Sd5 Tc2 36.Th7+ Kc6 37.Dc8+ Dc7 38.Txc7+ Kb5 39.Kxc2 a5
>>40.Dxb7# is #7, not #151.
>>
>>Do you count 151 or 153 moves in those mate lines? ;-)))
>
>
>You did not give proof that there is no mate in 153! :)
>
>    Christophe


No, I gave only the proof that the given mating line is a mate in 8 and not a
mate in 153 as Shredders eval suggests... ;)

For the record: I don't consider this a serious bug. It is just a minor flaw the
user should be aware of.

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