Computer Chess Club Archives




Subject: Re: Spike-Rybka

Author: Sandro Necchi

Date: 00:52:47 12/28/05

Go up one level in this thread

On December 28, 2005 at 03:12:23, Vasik Rajlich wrote:

>Interesting game. I didn't like .. h6 and .. g5 by Rybka in the opening (as I
>suspect most human players won't), and there were a few moments in the endgame
>where better resistance could have been put up - but these are relatively minor
>The biggest issue was the incorrect sacrifice of the h6 pawn. The Rybka static
>eval incorrectly gives the following position (and others of a similar type) as
>roughly equal:
>[D] 8/1b2b1k1/pp1ppp2/nPq5/P1P1P3/2QRNPP1/8/1N2KB1r b - - 0 27
>I'll keep to myself my proposed solution. It's a tricky issue and won't be
>handled until after the Rybka 1.2 release. If anybody wants to share here, I am
>all ears :-)

Hi Vas,

here a quick game analyse with comments.


1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5?! {it is not as
good as most people think} 5. dxc5! O-O 6. a3 Bxc5 7. Nf3
Nc6?! {I believe this move to be weak} 8. Bg5 b6?! {the
problem of this variation is the pawn left in d7 which will make
it hard to play for most programs} 9. Rd1!? Bb7 10. e4
h6? {better Be7} 11. Bh4 g5?! {weakening the king }
12. Bg3 Nh5?! {black should counter attack in the center
and not look for exchanging the knight versus the bishop}
13. b4! {Shredder gives here a good advantage to white as
black will get more compressed} Be7 14. b5?! {it should be
stronger Qd2 to prepare to attack the king side} Na5
15. Ne5 d6 16. Ng4 Qc7?! {Rc8 should be stronger}
17. Nxh6+ Kg7 18. Ng4 Nxg3 19. hxg3 Rh8 20. Rxh8 Rxh8
21. Nb1 Qc5 22. Qc3+ f6 23. f3 Rh1 24. Ne3! a6 25. a4 g4
26. Rd3! gxf3 27. gxf3 Qg5 28. g4 Kg6 $2 29. Nd2 Qe5
30. Qd4 Qxd4? {changing the most active piece gives white
advantage} 31. Rxd4 Rh8 32. f4! {Shredder gives white
half a piece ahead while Rybka evaluate the position about
even...I think Shredder is correct}

This page took 0.01 seconds to execute

Last modified: Thu, 07 Jul 11 08:48:38 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.