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Subject: Re: If you like to solve mate from real game...

Author: Paul Byrne

Date: 22:48:46 01/28/01

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On January 28, 2001 at 14:30:50, Heiner Marxen wrote:

>On January 28, 2001 at 12:59:25, Paul wrote:
>
>>On January 28, 2001 at 12:10:55, Enrique Irazoqui wrote:
>>
>>>On January 28, 2001 at 12:00:13, leonid wrote:
>>>
>>>>Hi!
>>>>
>>>>If you like to solve one forced mate from real game, below you have on position.
>>>>
>>>>[D]r4rk1/ppRn1p2/6pb/1P2pq1p/3N4/P1QPn1Pb/1B1NPP1P/4R1KB b - -
>>>>
>>>>Played in Brussels in 1937. O'Kelly and Devos.
>>>>
>>>>Please indicate your result.
>>>>
>>>>Leonid.
>>>
>>>Deep Fritz finds a mate in 7 very quickly.
>>>
>>>Enrique
>>>
>>>New position
>>>r4rk1/ppRn1p2/6pb/1P2pq1p/3N4/P1QPn1Pb/1B1NPP1P/4R1KB b - - 0 1
>>>
>>>Analysis by DEEP FRITZ   :
>>>
>>>1...Qxf2+! 2.Kxf2 Ng4+ 3.Kf3 e4+ 4.Kxe4 Ndf6+ 5.Kf3 Nxh2+ 6.Kf2 Nfg4+ 7.Kg1
>>>  -+  (-#7)   Depth: 8/29   00:00:01  579kN
>>>
>>>(Irazoqui, CadaquƩs 28.01.2001)
>>
>>Yep ... mine says the same in 0.0 seconds :) Last move is Be3x ...
>>
>>Paul
>
>Chest cannot improve on this.  Its PV is slightly different:
>Qxf2+ Kxf2 Ng4+ Kf3 e4+  Kxe4 Ngf6+ Kf3 Ne5+ Kf2 Nfg4+ Kg1 Be3#
>
>Chest needs 95 seconds (K7/600 60MB hash).  Look Paul, your program is
>much faster than Chest!  :-)
>
>Heiner

Surprisingly, mine sees this one in 2167 nodes.  It's nice to see it finally
solve one of leonid's problems.  :)

-paul



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