Author: Enrique Irazoqui
Date: 10:48:16 05/21/98
Go up one level in this thread
On May 21, 1998 at 13:39:39, Christophe Theron wrote: >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. Tiger's time is impressive, but take a look at most top programs... One of my very favorite positions is the Badai problem I posted last Summer: 8/1p6/p4p1p/2p1P2k/5P2/6pP/1P4P1/6K1 w - - 0 0 White to play 1.f5 How is Tiger doing with this one? Enrique > Christophe
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