Author: Uri Blass
Date: 01:47:49 08/30/00
Go up one level in this thread
On August 30, 2000 at 04:34:08, Ricardo Gibert wrote: >On August 30, 2000 at 02:42:49, Uri Blass wrote: > >>On August 30, 2000 at 00:31:24, Ricardo Gibert wrote: >> >>>On August 29, 2000 at 23:19:59, Robert Hyatt wrote: >>> >>>>On August 29, 2000 at 19:18:17, Alexander Kure wrote: >>>> >>>>>On August 29, 2000 at 13:58:52, Graham Laight wrote: >>>>> >>>>>>Firstly, apologies to everyone for dashing off after the last game in the WMCCC. >>>>>> >>>>>>It enabled me to get an extra day's holiday with my girlfriend, though, which >>>>>>was well worthwhile! >>>>>> >>>>> >>>>>Well deserved, Graham! >>>>>Thanks again for your work. >>>>> >>>>>[...] >>>>> >>>>>This game clearly showed that Fritz plays in a different league than Crafty! In >>>>>fact I think this was one of the best games of the WMCCC. >>>>> >>>>>Greetings >>>>>Alex >>>> >>>> >>>>My take on this game is a bit different. I do _not_ want my program to make >>>>such a sacrifice and then see the eval steadily go _down_ over the next few >>>>moves. It means one of two things for it to win such a game: >>>> >>>>1. The eval is bogus. It is saying "this is bad" when in reality "this is >>>>good". I don't want that sort of evaluation. >>> >>>But this is unavoidable. Otherwise computer programs would only need to do a 1 >>>ply search. >>> >>>> >>>>2. The program was lucky. A little luck doesn't hurt. But it doesn't win >>>>tournaments very often. >>> >>>Again, unavoidable. Have crafty play against itself and you will still have >>>decisive games. The games are won due to luck, since they have the same eval. >>>The question is, "did Fritz make a good gamble?" >>> >>>> >>>>Either the eval was wrong, or it was lucky. Neither one leave me feeling like >>>>"fritz is in a different league than Crafty..." >>> >>>Of course, but that is pretty much how _all_ games are decided isn't it? >> >>No >> >>There are games when one side get advantage and slowly increase the advantage >>without having a worse position. > >The only truly correct evals are a: win, draw or loss. The other stuff in >between are _practical_ assessments that do not correspond to the true >evaluation of the position, but they are precisely what all programs rely on in >all games. Yes? > >> >>> >>>> >>>>I suspect white has better moves that might have justified the pessimistic eval >>>>Fritz had... The right program might have made that sacrifice look as ugly as >>>>this game made it look brilliant... >>> >>>Better moves may exist, but you have to _find_ them. >> >>Crafty could find Nxe6. > >If Nxe6 is an improvement for crafty, it had to find it during the game and not >after. Why it didn't is irrelevant to the result. The result still stands. The result stands but the impression that fritz is a different league than crafty does not stand. Uri
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