Author: Uri Blass
Date: 07:46:30 12/15/05
Go up one level in this thread
On December 15, 2005 at 04:45:52, Vincent Lejeune wrote: >On December 15, 2005 at 03:16:00, Chrilly Donninger wrote: > >>> >>> >>>>Maybe Rybka is a Nimzo clone :-) >>> >>> >>> >>>No, maybe not. :) >>> >>>More interesting is - will HYDRA become a RYBKA clone? :) >>> >>One of the most important inventions in Computer chess was the Autoplayer. >>People have before played against other programms, but this was cumbersome. >>Since then the development is a (co-)evolution. The programmers react on the >>ideas of others. It is some sort of silent conversation. E.g. when Shredder came >>with his impressive search depths, the other programmers had to react too. One >>can not sit there and watch how Shreddere outsearches one ones creation. One >>also knows: There is stil a lot of potential in pruing. After all it works in >>Shredder. >>The same will happen with Rybka. It has the advantage of being a new species >>which is somewhat different to the current population. But the ecosystem will >>react on Rybka. Thats the way evolution works. >> >>A concrete Hydra-example: In the Match Topalov-Hydra, Bilbao 2004, Hydra got a >>passed pawn on d3 and was very happy about the position. Actually the idea was >>quite bad and we almost lost the game. So we reduced the value of central-passed >>pawns in the Middlegame. Rybka does not know about this and likes to push his >>d/e pawn. Hydra does not care, because it was told to avoid the >>"Topalovmatch-pawn-push" (it works always in both directions). I have increased >>the bonus now again slightly to avoid this problem against Rybka. And I will >>probably kick myself in the ass, if Hydra makes against a top GM the next time >>the same stupid move like in Bilbao. >> >>Chrilly > >[d]1n1q1rk1/r3bppp/bp2p3/p1p1P3/3p2QP/2P1P1B1/PPBN1PP1/R3K2R b KQ h3 0 15 > >The eternal question, for humans too, is a pass pawn weak or strong ? > >Here it seems quite simple after the seeing the Topalov moves. Humans ask : "How >black can protect this pawn ?" and then "How white can prevent black to play the >moves helping to protect the pawn ?" > >It's strange hydra didn't found the best line here : all tries to protect the >pawn are stopped ! Thanks for the game Chrilly Donninger is not correct when he claims that Rybka likes to push the d pawn. Rybka does not like 15...d3 at level that is not blitz. Rybka after 25 minutes of search Veselin Topalov - Hydra, Man vs Machine 120'/40+60' 2004 [D]1n1q1rk1/r3bppp/bp2p3/p1p1P3/3p2QP/2P1P1B1/PPBN1PP1/R3K2R b KQ h3 0 1 Analysis by Rybka 1.0 Beta 32-bit: 15...d3 ³ (-0.44) Depth: 3 00:00:00 15...d3 ³ (-0.32) Depth: 4 00:00:00 15...d3 16.Bb3 ³ (-0.40) Depth: 5 00:00:00 15...d3 16.Bb3 Nc6 ³ (-0.32) Depth: 6 00:00:00 7kN 15...d3 16.Bb3 Nc6 17.0-0-0 ³ (-0.32) Depth: 7 00:00:00 16kN 15...d3 16.Bb3 Nc6 17.0-0-0 Qc7 ³ (-0.35) Depth: 8 00:00:00 43kN 15...d3 16.Bb3 Nc6 17.h5 Qc7 18.Nf3 ³ (-0.34) Depth: 9 00:00:01 114kN 15...d3 16.Bb3 Nc6 17.h5 Qc7 18.Nf3 h6 ³ (-0.37) Depth: 10 00:00:02 219kN 15...d3 16.Bb3 Nd7 17.h5 h6 18.0-0 Qc7 19.Qe4 ³ (-0.35) Depth: 11 00:00:06 503kN 15...d3 16.Bb3 Qc7 17.h5 Nd7 18.h6 g6 19.Qf4 a4 ³ (-0.35) Depth: 12 00:00:17 1412kN 15...d3 16.Bd1 Nc6 17.Bf3 Qc7 18.Qf4 Rd8 19.0-0 a4 20.Rad1 ³ (-0.35) Depth: 13 00:00:46 3565kN 15...d3 16.Bd1 Qc7 17.Bf3 Nd7 18.Nc4 Bxc4 19.Qxc4 Nxe5 20.Bxe5 = (-0.25) Depth: 14 00:01:29 6905kN 15...Rd7 16.0-0-0 d3 17.Bb1 Nc6 18.h5 h6 19.a3 Qc7 20.Nc4 ³ (-0.50) Depth: 14 00:03:21 14530kN 15...Rd7 16.0-0-0 d3 17.Bb1 Nc6 18.h5 h6 19.Ne4 c4 20.Bf4 ³ (-0.45) Depth: 15 00:04:00 17235kN 15...Rd7 16.0-0-0 d3 17.Bb1 Nc6 18.Ne4 h6 19.Bf4 Kh7 20.Qf3 ³ (-0.48) Depth: 16 00:06:16 26480kN 15...Rd7 16.0-0-0 d3 17.Bb1 Nc6 18.h5 h6 19.Qe4 Bb7 20.Qc4 ³ (-0.43) Depth: 17 00:10:22 43511kN (, 15.12.2005)
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