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Subject: Re: Very Tough Mate in 4 for Some Engines

Author: William Kerr

Date: 09:02:59 03/28/03

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On March 28, 2003 at 09:24:50, Pierre Bourget wrote:

>On March 27, 2003 at 21:12:39, William Kerr wrote:
>
>>[D]8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3;id #1097 mate in 4
>>very-very tough;
>>
>>
>>Very tough mate in 4 for some engines.
>>
>>This position may have been posted before.
>>
>>
>>Morphy run on a Great Game Machine 6502 at 2 Mhz
>>Pocket Fritz 1.0 on a Cassiopeia E125  MIPS @ 150 Mhz
>>All others run on a PC - PII 300, 256Mbytes Ram.
>>
>>The small m seen below stands for mate.
>>
>>cm9k 6:14 m11, 8:51 m6, 9:59 m4
>>fritz532 3:21 m8 Nc3
>>crafty no solve in 8 Min
>>pocket genius 3 min no solve
>>pocket fritz < 44 sec
>>pocket grandmaster 6 min Ne3 +12.26 12/51
>>yace < 7 min m11, 26:30 m4
>>extreme 2:54 m6 16/34
>>ruffian10 no solve 6 min
>>Ruffian 101 > 6 min < 10 Min mate found
>>doctor3 15 sec m4
>>bringer 15 min no solve
>>sargon4  5 sec m4
>>rebel10 17 sec m6, 37 sec m4
>>lg2kv2.7 10 min no solve
>>uscf 5 sec
>>wkchess 33 sec
>>morphy 5:27
>>
>>Enjoy
>>
>>Bill
>
>What is the source and author please .
>
>Pierre

Hi Pierre

Its from Chess Life & Review Nov 1979 Benko's Bafflers # 1097 A. French, Mn

Bill




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