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Subject: Re: Mate in 4 - NO, not even in 9!

Author: F. Huber

Date: 00:28:37 05/10/04

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On May 09, 2004 at 18:02:57, Jorge Pichard wrote:

>On May 09, 2004 at 17:16:57, Jorge Pichard wrote:
>
>>On May 09, 2004 at 16:31:48, Rob Basham wrote:
>>
>>>[D]2rqn3/5rbk/3p1n1p/p2Pp2P/1p1Nb3/4BNR1/PP1Q1P2/3BK1R1 w - - 0 1
>>>
>>>I added some more pieces to the neat "mother of combinations"
>>>diagram below....:-)
>>>
>>>I think it is a mate in 9....even with the black queen still on the board...
>>>
>>>
>>>1. Bxh6.....etc.
>>
>>In this position it is Mate in 9, but with the original position it is a draw
>>with good defense :-)
>>
>>
>[Event "Shootout (Shredder8, Blitz:30'+3") "]
>[Site "?"]
>[Date "????.??.??"]
>[Round "?"]
>[White "New game"]
>[Black "?"]
>[Result "1-0"]
>[SetUp "1"]
>[FEN "2rqn3/5rbk/3p1n1p/p2Pp2P/1p1Nb3/4BNR1/PP1Q1P2/3BK1R1 w - - 0 1"]
>[PlyCount "7"]
>
>1. Bxh6 {[%eval 801,13] [%emt 0:01:37]} Bxh6
>2. Qxh6+ {[%eval 1026,17] [%emt 0:00:42]} Kxh6 {[%eval 1026,7] [%emt 0:00:00]}
>3. Rg6+ {[%eval 1099,18] [%emt 0:01:10]} Bxg6 {[%eval 1099,24] [%emt 0:00:40]}
>4. Rxg6+ {[%eval 1099,22] [%emt 0:01:17]} Kxh5 5. Nxe5+ Kh4 6. Rh6+ Kg5 7.
>Nxf7+ Kf4 8. Rh4+ Ng4 9. Rxg4# 1-0

After 4.Rxg6+ the black move 4.Kxh5 is a rather bad defense!
Try 4... Kh7 and then look for a mate - you´ll not find any ...
(except you´re better than Chest ;-))

So this PV showing a ´mate in 9´ is definitely wrong!
(I´m quite sure, that it´s no mate in 9 at all)

Conclusion: a ´Shootout´ with a normal chess engine (even with Shredder 8)
is absolutely unsuitable for proving any ´mate in x´!

Regards,
Franz.



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