Author: Uri Blass
Date: 16:46:23 02/17/06
Vincent claimed that rybka's evaluation is very close to fruit in the following messgae. http://www.talkchess.com/forums/1/message.html?487109 He wrote. "I am for example debugging a position here from a testgame from diep. Where Diep says here +2.3 for white, Zappa says +1.0. Rybka says 0.1 there and Fruit also says 0.1 there." I also analyze positions with rybka and fruit and cannot find the similiarity Here is the last one. 237: Uri Blass - Rybka 1.01 Beta 13d 32-bit, 68'/40+68'/40+68'/40 [D]7r/5Q2/4r3/5k2/3P1n2/2P5/PP3K2/8 b - - 0 1 Analysis by Fruit 2.2.1: 40...Ke4 ² (0.41) Depth: 1/3 00:00:00 40...Ke4 41.Kg3 Rg6+ 42.Kf2 = (0.06) Depth: 2/7 00:00:00 40...Ke4 41.Kg1 Rg6+ 42.Kf1 = (0.00) Depth: 3/11 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 4/13 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 5/14 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 6/20 00:00:00 19kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 7/20 00:00:00 39kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 8/20 00:00:00 86kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 9/24 00:00:01 198kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 10/24 00:00:01 443kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 11/31 00:00:01 1269kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 12/37 00:00:04 3965kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rh2+ 43.Kg3 Ree2 44.Qd5+ Kh6 45.a4 Rxb2 46.Qc6 Rh5 47.d5 Rg5+ 48.Kf3 = (-0.01) Depth: 12/37 00:00:10 10093kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rh2+ 43.Kg3 Ree2 44.Qd5+ Kh6 45.a4 Rxb2 46.Qc6 Rh5 47.d5 Rg5+ 48.Kf3 Rf5+ 49.Kg3 = (-0.02) Depth: 13/37 00:00:13 12345kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Rf2+ 45.Kg3 Rc2 46.Qd5+ Kh6 47.a4 Rxb2 48.Kg4 Rg1+ 49.Kf3 Nh4+ 50.Ke4 Re2+ 51.Kd3 = (-0.03) Depth: 14/40 00:00:31 30612kN 40...Rf6 41.Qd7+ Kg5 42.a4 Rh2+ 43.Kg3 Rg2+ 44.Kf3 Rxb2 45.Qg4+ Kh6 46.Qc8 Rb1 47.Qh8+ Kg5 48.Qg8+ Ng6+ 49.Ke3 Re6+ 50.Kd3 Rf1 51.a5 Rf8 52.Qg7 = (-0.05) Depth: 14/49 00:01:32 89769kN 40...Rf6 41.Qd7+ Kg5 42.a4 Rh2+ 43.Kg3 Rh3+ 44.Kf2 Nd3+ 45.Kg1 Rhf3 46.Qd8 Nxb2 47.Kg2 Nd1 48.Qg8+ Kf4 49.Qb8+ Ke3 50.Qc7 Rg6+ 51.Kh2 Rf2+ 52.Kh3 = (-0.07) Depth: 15/49 00:02:34 151361kN 40...Rf6 41.Qd7+ Kg5 42.a4 Rh2+ 43.Kg3 Rh3+ 44.Kf2 Nd3+ 45.Kg2 Re3 46.Qd8 Kg6 47.Qg8+ Kh5 48.Qh8+ Rh6 49.Qb8 Rg6+ 50.Kh2 Re2+ 51.Kh3 Rxb2 52.Qh8+ Kg5 = (-0.11) Depth: 16/49 00:05:52 346856kN 40...Rf6 41.Qd7+ Kg5 42.a3 Rh2+ 43.Kg3 Rg2+ 44.Kf3 Rxb2 45.Qg7+ Ng6+ 46.Ke4 Re6+ 47.Kd3 Ra6 48.d5 Ra5 49.Qg8 Kh6 50.c4 Rxa3+ 51.Ke4 Re2+ 52.Kd4 Kg5 53.Qd8+ Ne7 = (-0.12) Depth: 17/55 00:12:20 731360kN (, 18.02.2006) 237: Uri Blass - Rybka 1.01 Beta 13d 32-bit, 68'/40+68'/40+68'/40 7r/5Q2/4r3/5k2/3P1n2/2P5/PP3K2/8 b - - 0 1 Analysis by Rybka 1.01 Beta 13d 32-bit: 40...Ke4 µ (-1.25) Depth: 3 00:00:00 40...Ke4 µ (-1.15) Depth: 4 00:00:00 40...Ke4 41.Qb7+ Nd5 µ (-0.99) Depth: 5 00:00:00 40...Kg5 41.Qg7+ Ng6 µ (-1.00) Depth: 5 00:00:00 40...Kg5 41.Qg7+ Ng6 42.d5 µ (-1.01) Depth: 6 00:00:00 10kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 µ (-1.04) Depth: 6 00:00:00 11kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 µ (-1.04) Depth: 7 00:00:00 16kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 Rhf8 µ (-1.11) Depth: 8 00:00:00 29kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 Rhf8 44.Qh7+ Ke3 µ (-1.06) Depth: 9 00:00:00 73kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 µ (-1.23) Depth: 9 00:00:02 180kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 Rff2 µ (-1.19) Depth: 10 00:00:03 312kN 40...Kg5 41.Qg7+ Ng6 42.Qd7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 Rf5 46.d5 -+ (-1.46) Depth: 11 00:00:12 1113kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Rf5 44.Kh2 Nh4 45.Qg7+ Kh5 46.Qh7+ Kg4 -+ (-1.52) Depth: 12 00:00:21 2043kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Rf5 44.Qg2+ Kf6 45.Qb7 Nf4 46.Qc8 Re2 -+ (-1.56) Depth: 13 00:00:38 3629kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 Rh5 44.a3 Rff5 45.Qg4+ Nf4 46.Kf2 Rh2+ 47.Kf1 -+ (-2.41) Depth: 13 00:00:55 4927kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 Rh5 44.c4 Rff5 45.Qg4+ Ke3 46.Qg3+ Ke2 47.Qg4+ -+ (-4.34) Depth: 14 00:01:02 6013kN 40...Ke4 41.Qb7+ Nd5 42.c4 Kd3 43.Qxd5 Rf8+ 44.Kg3 Rg6+ 45.Kh4 Rh8+ 46.Qh5 Rxh5+ 47.Kxh5 -+ (-4.37) Depth: 15 00:01:12 7167kN (, 18.02.2006) People can claim that rybka's strength is the search but it is a fact that it has important evaluation knowledge that fruit does not have. Also shredder does not have that knowledge and needs some search to find a significant big score for black. 237: Uri Blass - Rybka 1.01 Beta 13d 32-bit, 68'/40+68'/40+68'/40 7r/5Q2/4r3/5k2/3P1n2/2P5/PP3K2/8 b - - 0 1 Analysis by Shredder 9 UCI: 40...Ke4 ² (0.67) Depth: 1/1 00:00:00 40...Ke4 ² (0.67) Depth: 1/1 00:00:00 40...Ke4 ± (0.92) Depth: 2/5 00:00:00 40...Ke4 41.c4 ± (0.92) Depth: 2/5 00:00:00 40...Ke4 41.c4 ² (0.58) Depth: 3/5 00:00:00 40...Ke4 41.c4 Rh2+ 42.Kg3 ² (0.34) Depth: 3/7 00:00:00 40...Ke4 41.c4 = (0.09) Depth: 4/8 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 4/8 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 5/10 00:00:00 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 6/13 00:00:00 4kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 7/21 00:00:00 16kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 8/21 00:00:00 50kN 40...Ke4 41.Qb7+ Kf5 = (0.00) Depth: 9/26 00:00:01 161kN 40...Kg5 = (-0.01) Depth: 9/26 00:00:01 208kN 40...Kg5 41.Qg7+ Ng6 42.d5 Re7 43.Qd4 Rh2+ 44.Kg3 Rh3+ 45.Kf2 Rh2+ 46.Kg3 Rh3+ 47.Kf2 Rh2+ = (-0.02) Depth: 9/26 00:00:01 266kN 40...Kg5 41.Qg7+ Ng6 42.d5 Re7 43.Qd4 Rh2+ 44.Kg3 Rh3+ 45.Kf2 Rh2+ 46.Kg3 Rh3+ 47.Kf2 Rh2+ = (-0.02) Depth: 10/28 00:00:01 337kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 Re1+ 46.Kh2 Re2+ 47.Kg1 Re1+ = (-0.02) Depth: 11/32 00:00:01 791kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 Re1+ 46.Kh2 Re2+ 47.Kg1 Re1+ = (-0.02) Depth: 12/33 00:00:02 1296kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg1 Re1+ 46.Kh2 Re2+ 47.Kg1 Re1+ = (-0.02) Depth: 13/34 00:00:03 2244kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg1 Re1+ 44.Kh2 Re2+ 45.Kg3 Re3+ = (-0.03) Depth: 14/37 00:00:09 5671kN 40...Kg5 41.Qg7+ Ng6 42.Qb7 Rf8+ 43.Kg3 Re3+ 44.Kh2 Re2+ 45.Kg3 Re3+ 46.Kh2 Re2+ 47.Kg3 Re3+ = (-0.03) Depth: 15/40 00:00:18 12298kN 40...Ke4 = (-0.04) Depth: 15/40 00:00:29 18832kN 40...Ke4 41.Qb7+ Nd5 42.Qg7 Rf6+ 43.Kg1 Rhf8 44.Qh7+ Ke3 45.Qh3+ Kd2 46.Qh2+ Kd3 47.Qh3+ ³ (-0.38) Depth: 15/40 00:00:43 28041kN 40...Ke4 41.Qb7+ ³ (-0.63) Depth: 16/42 00:00:59 38248kN (, 18.02.2006) I wonder if new fruit is going to have the knowledge that black is better. Note that rybka can see big score for black even at depth 3 and even if we consider that depth 3 of rybka is equivalent to depth 5 of other programs not fruit and not shredder can see big score for black of at least 0.5 pawns even at depth 14. Uri
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.