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Subject: Re: Mate in 13 Position in CSS 01/01 - Chessmaster 6555 in 2:41 min

Author: Uri Blass

Date: 21:14:36 02/19/01

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On February 19, 2001 at 15:56:25, Heiner Marxen wrote:

>On February 19, 2001 at 13:49:37, leonid wrote:
>
>>On February 19, 2001 at 13:43:43, Andreas St. wrote:
>>
>>>On February 19, 2001 at 13:36:59, Andreas St. wrote:
>>>
>>>>Hi,
>>>>
>>>>German Magazine "CSS" 01/01: Position from Gerhard Josten:
>>>>
>>>>white: Kb5;;Qa1,b3,d6,g7;;Ra3,d3;;Nb1,e3;;Pd2
>>>>black: Ke4;;Qb8;;Rf5,g8;;Bb2,b7;;Na2,b4,c2;;Pc5,c7,d4,e5,f4,f6,h4
>>>>
>>>>Mate in 13: 1.Kc4
>>>>
>>>>Chessmaster 6555 sees mate in 13 (says 12) in 2:41 min on Athlon 650 - 128 MB
>>>>hashtables.
>>>>
>>>>Which programme is faster?
>>>>
>>>>Greets
>>>>
>>>>AS
>>>
>>[D]1q4r1/1bp2pQ1/3Q4/1Kp1pr2/1n1pkp1p/RQ1RN3/nbnP4/QN6 w - - 0 1
>
>Uh, that is an ugly one for Chest.  For "no mate in 9" it needs already
>32 minutes (K6-3/400, 60MB hash).  Its heuristic for choosing defender
>moves seems to be fooled quite often, which is surprising for me.
>This heuristic normally is quite successful.
>
>Chest gives up :-(
>
>Heiner

Maybe chessmaster can help to prove it.

The first thing that it needs to do is to solve a mate for black after every
legal move except Kc4.

It seems possible because Junior5.9 with the 2 options says that the second best
move for white(1.Rxd4+) has evaluation of 8.07 pawns against itself.

Uri



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