Author: Uri Blass
Date: 08:22:45 12/01/00
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On December 01, 2000 at 10:26:44, James T. Walker wrote: >On December 01, 2000 at 09:45:17, Uri Blass wrote: > >>On December 01, 2000 at 09:16:12, martin fierz wrote: >> >>>i was wondering about some evaluations which fritz 5.00 gives me for the >>>following position: >>> >>>[D]1k1r3r/p1p1n3/1pq1p2p/P3Ppp1/2QP4/8/2P1NPPP/RR4K1 w - - 0 0 >>> >>>the black king is under attack, but fritz gives about +1.5 on depth 11 >>>for qxc6 (to be fair, this is only the second-best move according to fritz). >>>after you play out the moves qxc6 nxc6 the evaluation drops immediately to 0, >>>which is obviously a better evaluation for the position after the queen >>>exchange. >>>is this an example for preprocessing in action - bad black king AND queens on >>>the board? >> >>Yes >> >><snipped> >>> and if yes: which programs do NOT make this type of mistake? >> >>Gandalf does not do preprocessing and I believe that there are a lot of programs >>that do not do this kind of mistake. >> >>My experience with chessmaster6000,hiarcs7.32 and Junior also suggest that they >>are better than Fritz5 in avoiding preproccesing. >> >>I believe that Fritz5 does more preprocessing than most programs. >> >>I have not Fritz6a but I read that Fritz6 is clearly better in avoiding >>preprocessing and this is one of the reasons thast fritz6a is better. >> >>Uri > >I gave this to Fritz 6 and it has +1.34 with Qa6. I think the evaluation is OK >but exchanging Queens kills the attack. Fritz 6 seems to try to avoid this >exchange. >Jim The question is what is the evaluation of Qxc6 in the original position. I understood from the first post that Fritz5 also did not play Qxc6 but evaluated it as the second best move with evaluation of +1.5 at depth 11 when you give it 2 options. The question is what is the evaluation of fritz6 when you give it enough options to give a score to Qxc6. Uri
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