Author: Uri Blass
Date: 08:17:26 01/29/03
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On January 29, 2003 at 10:55:52, Thomas Lagershausen wrote: >On January 28, 2003 at 21:22:06, Uri Blass wrote: > >>On January 28, 2003 at 19:27:29, Tony Werten wrote: >> >>>On January 28, 2003 at 12:52:54, Thomas Lagershausen wrote: >>> >>>>[D]2rqrbk1/5pp1/pnbp1n1p/1p2p3/1P2P2B/1BPQ1NNP/P4PP1/R3R1K1 b - - not 21...g5? >>>> >>>>Pepito 1.55 on Athlon 1.5 Ghz by Carlos del Cacho will play here 21..g6 ! >>>> >>>>This avoids 22.Nh5 or Nf5 by white and gives black a healthy kingposition. >>>> >>>>As we see in the game the bishop on h4 is poisenend. >>>> >>>>How long did it take for your program to avoid 21...g5? >>> >>>XiniX needs 1m44 to drop g5 >>> >>>ply:11/21 score:0.060 time:0:22 224 Kn/s >>>1. .. g5 2.Nxg5 hxg5 3.Bxg5 Bb7 4.Nf5 Nc4 5.Qg3 Nh5 6.Qg4 f6 7.Qxh5 fxg5 >>> >>>ply:11/22 score:0.068 time:1:44 219 Kn/s >>>1. .. Bb7 2.Bxf6 Qxf6 3.a4 bxa4 4.Bxa4 Nxa4 5.Rxa4 Be7 6.b5 axb5 7.Qxb5 >>> >>>Tony >> >>I am not sure if it is a good test position. >>It is possible that g5 was not a mistake and the mistake was later. >> >>Black has alternatives later in the game(for example 27...axb5 instead of the >>better move 27...Bxb5). >> >>It is a common mistake of humans to assum that a sacrifice was winning without >>proof only because of the fact that the side who sacrificed won and it is >>possible that Nxg5 is enough only for a draw like other moves. >> >>It is also a common mistake of me to analyze chess positions instead of working >>about more important things like Movei or maybe they are not more important. >> >>Uri > >I am not a beginner of computerchess.My name is good for a good testpostion.My >testpositions are being proofed. > >TL > >TL In case that your test position is correct manyhours of analysis are needed to prove it. This is not a case of one long forced line. You can have an opinion that white is winning with Nxg5 based on experience in similiar positions but it is not a proof. Uri
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