Author: José de Jesús García Ruvalcaba
Date: 15:26:44 03/08/00
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On March 08, 2000 at 18:04:48, Andrew Dados wrote: >On March 08, 2000 at 17:54:35, Gerhard Vetter wrote: > >>Lately I found this easy-to-solve but elegant little study: >> >> >>8/8/8/8/4k3/1P1p4/1r6/R1N1K3 w Q - >> >>To my surprise many modern programs can't find the win despite of 5manTBS only >>2ply away! >> >>Junior 6 (with 5manTBS) sees only a draw after 45 min on Celeron 500/ 128 >>Also Shredder 4 and Nimzo 7.32 fail to solve it. >> >>It is interesting that the older versions of some of the above programs need >>only 0 sec >>(Nimzo99) resp. 10 sec (Junior 5.0). Tiger 12.0e takes also 0 sec. >> >>It would be interesting to know how other programs do in this position and even >>more >>interesting if someone can suggest a reason for this odd behaviour of some >>leading programs. >> >>Since I don't know if this information is embedded in the EPD: white has still >>castling rights. >> >>Gerhard > Yes, the queenside castling rights are in the fen string you posted (it is the 'Q' after the side to move). >I can be that your tablebases are somehow broken.. note that all programs >without TB access solved it... >It's of course just a guess. > >-Andrew- The very simple explanation is that Nalimov tablebases do not store castling rights. José.
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