Author: Christophe Theron
Date: 10:39:39 05/21/98
Go up one level in this thread
On May 21, 1998 at 13:03:00, Enrique Irazoqui wrote:
>On May 21, 1998 at 07:01:18, Georg Langrath wrote:
>
>>6k1/8/p3r2p/1p1pPpp1/1n1pP3/1Pq4P/PR4PB/3QN1K1 b
>>
>>This epd-file represents a position between Spassky-Tal 1959. Spassky
>>took the rook 1…Dxb2, and who hadn’t. But this is wrong. Even if you
>>play white with a weaker chessprogram against black with a stronger one,
>>white wins after that move.. The best move is 1…dxe4. On the opposite,
>>here a weaker black program always wins over a stronger black program
>>after that move.
>>
>>I wrote about the position in PLY (SSDF) about eight years ago. Even the
>>strongest chessprograms didn’t find the right move in those days. Not
>>even in analyze for a week or so. Does you program find it? Rebel9 find
>>it in analyze, but not in 3 minutes on my computer (Pentium 133).
>>
>>But Fritz 5 find the right move in about 10 seconds, and doesn’t change
>>its mind then! Nearly unbelievable.
>>
>>I have tested Fritz5 on the selfgoing update, and now I have ordered it.
>>Perhaps Chessbase shouldn’t be in a such hurry to put it away, when they
>>found that it was possible to make it selfgoing. (You have to put two
>>files to it from Cblight only).
>>
>>Not only I had buyed it after testing it, I think.
>>
>>Georg
>
>On a P200MMX:
>
>Fritz 5 finds dxe4 in 3 seconds (!!!).
>Rebel 9, 185 seconds.
>Junior 4.6, Hiarcs 6, Mchess 7.1, Nimzo98, Shredder 2, Genius 5 and CST
>take over 5 minutes.
>
>Very nice position. Thanks.
>
>Enrique
Chess Tiger 11.4, K5-100MHz, 16Mb hash, has a fail low on Qxb2 in 0.49s,
and finds dxe4 in 0.71s.
I let it run for several minutes and it never changed its mind.
Just to have some fun, I then ran the position with Tiger running on my
old 386sx 20MHz notebook (2Mb hash). It rejects Qxb2 in 18.78s (fail
low), and would play dxe4 in 28.34s.
So this position is maybe too easy for current programs.
Christophe
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