Author: Mike S.
Date: 01:15:30 09/19/03
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On September 18, 2003 at 17:52:24, Chessfun wrote: >(...) >Nevertheless the probability for >>all three is set to zero, when Ne7 has a '!'. > >You're right though Ne7 is ! > >>This should be the reason why it is played from book, > >Not sure I would assume Raf8 as optimized is minimum 3 games played so that >would be the only move that met the requirement. The "!" moves are tournament moves, IOW when the optimum F4 settings are chosen, the checkbox "tournament" is checked which means, "!" moves will be played from every book (and I guess, "?" or "?!" and maybe even "!?" never). - Disregarding the Prob and % values and obviously the number of games too, then. This can easily be tested, when you change the F4 options while looking at the book display. Can't check now, but IIRC it changes dynamically while choosing options in the dialogue box. AFAIK the "!", "?" etc. marks are done by manual editing only, because the game based generation doesn't create these (I think). So it's also possible to add a *novelty* as a tournament move to the book, which - obviously - cannot have no. of games, elo perf etc. yet, but must be played and preferred while in tournament book mode. Btw. except for the tournament moves handling, the "%" values are decisive (not Prob). Some other doubtful moves have been reported in the Schachwerkstatt message board, http://f50.parsimony.net/forum202220/ (german) Although, we've i.e. calculated the total probability for one clear mistake 19...Bd7 in the Giuoco Piano, and it was *less than 9%* to appear (not even taking the beginning moves of the main variant into account, which included a white move somewhat unlikely among computers). So while I'm confident that the Hiarcs 9 *engine* is - most probably - among the top-3 currently, it may happen that it will rank 4th or 5th on your list, or on SSDF, when the H9 book is used. Which would still be good of course. When there are not many more book problems than those which have been found already, and/or the book learning can limit the effect, then there are still good chances that Hiarcs 9 may rank 3rd or even better everwhere! :-) In the CSS Blitz list, it ranks 2nd and I guess it will be 2nd or even 1st on Stefan Pohl's FRC list. - But there, the engine books are not in use. Regards, Mike Scheidl
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