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Subject: Re: These should be mates in 8, can someone check them please

Author: Vincent Lejeune

Date: 06:56:21 05/31/02

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On May 31, 2002 at 09:52:58, Uri Blass wrote:

>On May 31, 2002 at 09:44:41, Les Fernandez wrote:
>
>>On May 31, 2002 at 07:05:46, Heiner Marxen wrote:
>>
>>>On May 31, 2002 at 02:44:52, Les Fernandez wrote:
>>>
>>>>I am interested in having someone with descent hardware and perhaps the 5 piece
>>>>egtb run these 6 positions and check them for mates.  I think the mate should be
>>>>around 8.  I am interested in seeing the ce value, ply depth and the time it
>>>>took to find it.  Thanks.
>>>>
>>>>rnb2r1k/3q4/2p1p1Q1/pp2NpP1/3P4/b2B2P1/1PPBK3/R7 b - -
>>>>rnb2r1k/8/2p1p1Q1/pp2NpP1/3P4/b2B2P1/1PPBK3/R6q b - -
>>>>rnb2r1k/8/2p1p1Q1/pp2NpP1/3P4/b2B2P1/qPPBK3/R7 b - -
>>>>r7/1ppbk3/B2b2p1/3p4/PP2nPp1/2P1P1q1/3Q4/RNB2R1K w - -
>>>>r6Q/1ppbk3/B2b2p1/3p4/PP2nPp1/2P1P1q1/8/RNB2R1K w - -
>>>>r7/Qppbk3/B2b2p1/3p4/PP2nPp1/2P1P1q1/8/RNB2R1K w - -
>>>
>>>According to Chest none of the above contains a (forced) mate in 8.
>>
>>Hi Heiner,
>>
>>Ok well maybe I did not make myself clear but I believe the mate will be less
>>then 8, in fact may be closer to 4.  I do not have the exact number in fact I am
>>not even sure it exists but I think it does.
>>
>>Thanks
>>
>>Les
>
>
>Chest checks for shortest mate first so if Heiner say there is not mate in 8
>that it means that there is also no shorter mate.
>
>I also believe that the only mate that may be in the positions that you post may
>be mate against the side to move and not mate for the side to move.
>
>The side to move is not the attacker in the position that you posted.
>
>I am not sure that the side to move is losing but if the side to move is winning
>then it is a long game.
>
>Uri


It's quite clear here that the side to move is the side who will be mated !



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