Author: Sune Larsson
Date: 09:06:30 02/25/01
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On February 25, 2001 at 11:44:22, Uri Blass wrote: >On February 25, 2001 at 11:17:38, Sune Larsson wrote: > >> >> [D]8/5b2/1k2p1p1/2NpP1P1/1K1P4/8/8/8 w - - 0 1 >> >> >> In this position white's knight is far superior to black's bishop. This is >> very old knowledge and white is winning this one. People that play French >> as black might have nightmares of positions like this. The black bishop >> can only defend the two weak pawns on e6,g6 or wander around like a ghost >> on the white squares. >> >> These are the evals from some programs - PIII 800 - 3 min thinking time. >> The higher +score the better. Remember, white has a won position. >> And it's about evaluating a superior horse vs a bad, bad bishop. >> >> [1.Na4+ Kc6 2.Ka5 Kb7 3.Nc5+ Kc7 (3.-Ka7 4.Kb5 Be8+ 5.Kb4 Bf7 6.Ka5 Bg8 7.Kb5) >> 4.Kb5 Be8+ 5.Ka6 Bf7 6.Nb7 Be8 7.Ka7 Bf7 8.Nd6 Bg8 9.Ka6 Kc6 10.Ka5 Bh7 >> 11.Nf7 Bg8 12.Nh8 Bh7 13.Ka6 Kc7 14.Kb5 Kb7 15.Kc5 Kc7 16.Nf7 Bg8 17.Nd6 Bh7 >> 18.Ne8+ Kd8 19.Nf6 and wins] >> >> >> 1) AnMon 5.07 +1.05 >> 2) Deep Fritz +1.00 >> 3) Fritz 6 +0.97 >> 3) Nimzo 7.32 +0.97 >> 5) Nimzo 8 +0.90 >> 6) Phalanx 22 +0.86 >> 7) SOS +0.80 >> 8) Crafty 18.01 +0.54 >> 9) CM8K +0.51 >> 10) Hiarcs 7.32 +0.48 >> 11) Fritz 5.32 +0.47 >> 12) Century 3 +0.43 >> 13) Gandalf 4.32g +0.36 >> 14) Junior 6 +0.32 >> 15) Junior 5 +0.27 >> 16) Gromit 3.1 +0.26 >> 17) Chess Tiger +0.18 >> >> Sune > >This way of comparing knowledge is wrong because programs do not mean to the >same thing when they say +1. >+1 can mean expected score of 65% for program A and expected score of 70% for >program B. > >Uri Right or wrong... but it might give a rough idea about things. And might also add some small pieces to the big puzzle... Come to think of the time when we were testing Tiger. In several games the cat found himself in trouble, sitting with the bishop vs a stronger knight... +0.18 in the above position - hm... Also the IM that commented Enrique's games noticed Fritz' superb handling of the horses...Hm... Sune
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