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Subject: Very Tough Mate in 4 for Some Engines

Author: William Kerr

Date: 18:12:39 03/27/03


[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



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