Author: Robert Hyatt
Date: 08:33:29 08/29/02
Go up one level in this thread
On August 28, 2002 at 13:23:47, Uri Blass wrote: >On August 28, 2002 at 12:13:11, Vincent Diepeveen wrote: > >>On August 28, 2002 at 11:01:52, Jayakumar Ramanathan wrote: >> >>the truth is that all you will find out is a very primitif information >>about it in programs like gnuchess and crafty which are open source. >> >>the real good evaluations are top secret, both from most amateurs as well >>as from commercials. > >I believe that most amateur have simpler evaluation than crafty. >I do not think that it is correct to call crafty evaluation primitive. What I would be concerned about would be that if I could not do better than lose 2 of every 3 games against this "primitive evaluation" I would worry that my comments would look a tad silly... The proof is not in the simplicity or complexity of something, but in the _results_... > >There are things that crafty knows when part of the commercial programs do not >know and I am talking about evaluation > >Here is a simple example > >Crafty knows to evaluate unstoppable passed pawns in pawn endgames. >Junior7 does not know it and needs search to find white's advantage. > > >New position >[D]8/6pp/6p1/6K1/8/8/P7/7k w - - 0 1 > >Analysis by Junior 7: > >1.a2-a4 Kh1-g2 > -+ (-1.67) Depth: 3 00:00:00 >1.a2-a4 Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 h7-h6+ 4.Kg5xg6 Kg3-g2 5.a6-a7 > = (-0.17) Depth: 9 00:00:00 3kN, tb=4 >1.a2-a4 Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 h7-h6+ 4.Kg5xg6 Kg3-g2 5.a6-a7 > = (-0.17) Depth: 9 00:00:00 3kN, tb=4 >1.a2-a4 Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 h7-h6+ 4.Kg5xg6 Kg3-g2 5.a6-a7 > = (-0.17) Depth: 9 00:00:00 3kN, tb=4 >1.a2-a4 Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 h7-h6+ 4.Kg5xg6 Kg3-g2 5.a6-a7 > = (-0.17) Depth: 9 00:00:00 3kN, tb=4 >1.a2-a4 Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 h7-h6+ 4.Kg5xg6 Kg3-g2 5.a6-a7 > = (-0.17) Depth: 9 00:00:00 3kN, tb=4 >1.a2-a4! > = (0.13) Depth: 12 00:00:00 6kN, tb=13 >1.a2-a4! Kh1-g2 2.a4-a5 Kg2-g3 3.a5-a6 Kg3-h2 4.a6-a7 h7-h5 5.a7-a8Q > +- (3.48) Depth: 12 00:00:00 10kN, tb=14 > (Blass, Tel-aviv 28.08.2002) > > >New position >8/6pp/6p1/6K1/8/8/P7/7k w - - 0 1 > >Analysis by Crafty 18.15: > >1.a2-a4 > +- (3.60) Depth: 1/2 00:00:00 >1.a2-a4 Kh1-g1 > +- (3.40) Depth: 2/2 00:00:00 >1.a2-a4 Kh1-g1 > +- (3.80) Depth: 3/4 00:00:00 >1.a2-a4 Kh1-g1 2.a4-a5 > +- (3.81) Depth: 3/4 00:00:00 >(Blass, Tel-aviv 28.08.2002) > >Uri
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