Author: Uri Blass
Date: 09:32:36 11/09/01
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On November 09, 2001 at 11:26:09, Gian-Carlo Pascutto wrote: >On November 09, 2001 at 11:01:00, William Penn wrote: > >>No! That is not correct! >> >>Only the Fritz 7 (with MMX) engine produces outright analysis blunders, based on >>my long experience of many years, running many different engines then >>scrutinizing the analysis carefully. > >Look harder. > >Anmon (or any MTD searcher), and Sjeng versions before 12 would do the >same. I'm sure there are other engines. Fritz 7 is now one of them. I do not understand what MTD has to do about it. I do not understand the reason to show a main line when black finish with a stupid queen sacrifice that is captured in the last ply of the pv. The main line can have mistakes in the last plies because the program did not search deep enough but the relevant mistake is not a result of not searching deep enough. If the program shows stupid moves in the last plies that are not result of a shallow search and the static evaluation(without search) of the final position in the main line is not identical to the evaluation that the program shows then it is better not to show a main line because the main line is supposed to be something logical(otherwise the program can choose random moves for the main line only to print something). I understand having a positive evaluation for white when the main line is finished with mate for black because there are programs(including Crafty) that do not evaluate mate in their evaluation function but I do not understand seeing evaluation function of +2 for white when the static evaluation of the final position in the main line has nothing to do with +2 unless the final position in the main line is read from hash tables and in this case the evaluation of the final position of the main line after search to the right depth should be +2 or at least the difference between it and +2 should not be too big(there can be a difference because the program may do preprocessing). Uri
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