Author: A. Steen
Date: 06:18:03 12/30/05
Go up one level in this thread
On December 30, 2005 at 08:51:19, Sune Larsson wrote: >On December 30, 2005 at 07:20:46, A. Steen wrote: > >>Unlike most of the crowd, at all stages I was confident Rybka would not lose >>this game: >> >>http://wwwcs.uni-paderborn.de/~IPCCC/IPCCC2005b/pgn7.html >> >>[Event "IPCCC"] >>[Site "Paderborn"] >>[Date "2005.12.30"] >>[Round "7"] >>[White "Ikarus V0.36FR7a SMP"] >>[Black "Rybka Beta w64 1.0"] >>[Result "*"] >>[ECO "B00"] >>[TimeControl "7200"] >>1. e4 Nc6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Bd3 Nge7 6. Bg5 Be4 7. c3 h6 8. Bxe7 >>Bxe7 9. Bxe4 dxe4 10. Nfd2 Qd7 11. Nxe4 O-O-O 12. Qe2 f6 13. f4 f5 14. Nf2 g5 >>15. O-O Rhg8 16. Kh1 g4 17. Nd1 h5 18. Nd2 h4 19. Ne3 h3 20. gxh3 gxh3 21. Rf3 >>Rh8 22. Qf1 Bf8 23. Rxh3 Bh6 24. Qf3 Ne7 25. Rg1 Kb8 26. Rg2 Qa4 27. Rh5 Qxa2 >>28. Qh3 Ng8 29. Ndf1 c6 30. Rg6 Re8 31. Rgxh6 Nxh6 32. Rxh6 Rhg8 33. Qh5 Qxb2 >>34. Qf7 Qxc3 35. Rxe6 Ref8 36. Qe7 Qxd4 37. Qd6+ Qxd6 38. Rxd6 a5 39. Ng3 Rd8 >>40. Ngxf5 a4 41. Nc2 Kc7 42. Rxd8 Rxd8 43. Nd6 Ra8 44. Kg2 a3 45. h3 a2 * >>40. Ngxf5 a4 41. Nc2 Kc7 42. Rxd8 Rxd8 43. Nd6 Ra8 44. Kg2 * > > > 27.a3! and it's a whole different ballgame.... Correct, Mr Larsson, though the exclamation mark is quite unnecessary IMO. But ... possibly slightly better was, on white's previous move, the prophylactic 26. b3. [d]1k1r3r/pppqn3/4p2b/4Pp2/3P1P2/1PP1NQ1R/P2N3P/6RK b - - 0 26 where if 26. ... a5 then 27. a4 and then if 27. ... b5 28. axb Qxb5 29. Ndc4 and white wins. Not that I suggest engines would want either 26. ... a5 or 27. ... b5. Why let the lady in to the Q-side at all? With the WK where it is, queening the h pawn is a very, very diffuse and long-term goal/threat, and there is time for the BK to gobble and return. Hence 26. b3 There is another difference between 26. b3 and 27. a3 - the one that makes me slightly prefer the former - but I leave it to you to find out. > First pawn sac is okey - as so the position > after 15.-Rhg8. It is even. > Then some queer moves followed - resulting in > pawn sac n:o 2 - and black has really no comp. Queer, yes. Tal's calling cards were queer too. And often he had no compensation - but he won the point all the same. Rybka, like Misha, knows his opponents are in some ways patzers, especially when the clock is ticking. As I wrote below: "So the theoretically unsound sac delivers the full point more often than not, until the next generation of opponents evolves." > > But why shall everything be "correct" and > scientific verifiable?? Clearly, you have understood what many others here did not. :-) Rybka is a pragmatic OTB playing engine, amply equipped with the poison that some GM or other might have said somewhere that Fruit lacked. > Boring boring said the child and smiled... and later collected the full point, leaving the local heroes fulminating about why their masterpieces do not deliver. Unfair old world, isn't it? > ;-) ;-) > /S > > > >> >>[d]r7/1pk5/2pN4/4P3/5P2/p7/2N3KP/8 w - - 0 45 >> >>After the obvious 44. ... a2, Ikarus has absolutely no winning chances and would >>be astoundingly lucky to draw (a power outage, maybe?). I stopped looking. >> >>While the above game is very far from a fine example of what Rybka is capable of >>(it is more of what poor Ikarus was hoodwinked into permitting), I could thank a >>few of the forum's "chess experts" for the amusing fantasies and wrong prognoses >>they wrote about this game along the way. >> >>Black obtained three supported united passed pawns on the Q-side while the White >>King was so magnificently placed on h1. Rybka's opponents do not properly know >>how to handle the very unbalanced positions that arise from Rybka's Tal-like >>sacs. So the theoretically unsound sac delivers the full point more often than >>not, until the next generation of opponents evolves. >> >>My general evaluation of Rybka: >>Much stronger than overly-staid Fruit, psychotic Shredder, berserk-monster >>Fritz. >> >>'Extraordinarily dynamic middlegame: unbelievable Rybka, a killer grandmaster.' >> >>A. Steen strongly recommends Rybka - >>* to patzers, to watch/study it play their other engines, and hopefully learn at >>least a little therefrom; and >>* to others, to play it themselves. >> >>Congratulations, Mr Rajlich. You clearly have (at least?) one super-GM on your >>team. :-)
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