Author: James T. Walker
Date: 09:54:23 12/01/00
Go up one level in this thread
On December 01, 2000 at 11:22:45, Uri Blass wrote: >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 Hello Uri, Here are the scores After 3 min on my Athlon 900. 1. 1.31 Qa6 2. 1.31 Qa2 3. 1.22 Qb3 4. 1.22 Qb4 5. 1.00 Qd3 6. 0.44 Qxc6 The bottom 3 scores all dropped after a couple more minutes. Jim
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