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Subject: Re: Mate in 16 mystery

Author: Andres Valverde

Date: 17:00:54 09/05/03

Go up one level in this thread


On September 04, 2003 at 10:20:40, Dana Turnmire wrote:

>In the following position Chess Genius 7 cannot find mate after many hours of
>analysing yet Chessmaster 9000 finds mate in 16 INSTANTLY.  What gives?
>[d] 4r1r1/bB4p1/8/2p1kPKn/n7/3R4/3P4/2B5 w - -


Rebel century 2 engine for ECTool in a AMD Athlon 1.4 found it instantly:


00:00  01.00  -7.45   1.Rd7
00:00  01.10  -5.39   1.Kxh5 Kxf5
00:00  01.16  -4.55   1.Re3+ Kd6 2.Kxh5
00:00  01.17  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5 3.Rd5+
00:00  02.00  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5 3.Rd5+
00:00  03.00  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5
00:00  04.00  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5 3.Rd5+
00:00  05.00  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5 3.Rd5+
00:00  06.00  0.00   1.Rd5+ Ke4 2.Rd6+ Ke5 3.Rd5+
00:00  07.00  Mate in 16 moves Rd5+1  e4 Rd7+ 2.Ke5 Ba3 3.c4 Bd6+ 4.Kd4
                       Bf8+ 5.Ke5  (0)


Positions                :         288.384
Nodes per second         :         288.384

Extensions (checks)      :          35.643 (12%)
Extensions (captures)    :             541 (0%)
Extensions (king safety) :             144 (0%)
Extensions (on depth)    :               0 (0%)
Extensions (remaining)   :              80 (0%)
Extensions (total)       :          36.408 (12%)

Hash Table               : 12.430  12.430  (1%)
Average depth            :  8
Deepest depth            : 49




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