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| Nov-19-06 | | classF: <whatthefat> Maybe there is a win for white. 4...Kg4 certainly busts the original puzzle, and chessbase says they think it's really a draw, but I don't see any proof of a draw, do you? |
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| Nov-19-06 | | whatthefat: <classF>
Perhaps it leads into an ending that the engine is misevaluating? I think deeper analysis is probably required. I'd like to hope that the puzzle can be salvaged! |
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| Nov-23-06 | | notyetagm: Here is a great example of how Rybka 2.2 simply has a deeper understanding of chess than the other top engines, here Deep Shredder 10: [Event "Rybka 2.2f mp testing 2"]
[Site "?"]
[Date "2006.11.20"]
[Round "23.2"]
[White "Deep Shredder 10 x64 2CPU"]
[Black "Rybka 2.2 mp x64 2CPU w/Fix"]
[Result "0-1"]
[ECO "E15"]
[PlyCount "88"]
[EventDate "2006.11.19"]
[Source "Leto"]
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 c6 8.
Bc3 d5 9. Ne5 Nfd7 10. Nxd7 Nxd7 11. Nd2 O-O 12. e4 b5 13. O-O dxc4 14.
bxc4 Nb6 15. Qc2 Nxc4 16. Nxc4 bxc4 17. Rad1 Qc7 18. e5 Rab8 19. Be4 g6 20.
Qd2 Qd7 21. Qe2 Rb6 22. Rfe1 Rfb8 23. Ra1 Bb4 24. Bxb4 Rxb4 25. Red1 Rb2
26. Qf3 R8b6 27. Qa3 h5 28. Rac1 Kg7 29. Qa5 Qe7 30. a3 Bb5 31. a4 Ra6 32.
Qc3 Rb3 33. Qe1 Rxa4 34. Bc2 a5 35. Bxb3 cxb3 36. Qe3 Rb4 37. Rb1 a4 38.
Rb2 Bc4 39. Ra1 Bd5 40. Qd2 Qb7 41. f3 Qb6 42. Kf2 Rxd4 43. Qe3 c5 44. Rab1
Qb4
0-1
Final position:
click for larger view |
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| Nov-23-06 | | notyetagm: I love this Rybka win over DS10 that I posted above because there are barely any tactics in Rybka's fine win. Rybka simply appreciates the importance of controlling and penetrating down an open file (23 ... ♗b4! 24 ♗xb4 ♖xb4 and 25 ... ♖b2 Black controls the 7th rank) and the power of passed pawns (33 ... ♖xa4! 34 ♗c2 allows a skewer but gains connected passed pawns for the exchange) more than DS10. If I did not tell you Rybka was Black in this game, you might think that the Black side was played by the great Petrosian. That is some praise for a computer program. This Rybka win looks so much like one of those instructive Petrosian victories that it is scary. |
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| Nov-23-06 | | whatthefat: <notyetagm: his Rybka win looks so much like one of those instructive Petrosian victories that it is scary.> Powerful game indeed. It even has the obligatory exchange sacrifice. |
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| Nov-23-06 | | notyetagm: <whatthefat: ... It even has the obligatory exchange sacrifice.> Yes! An exchange sacrifice to create connected passed pawns, something that Petrosian had a patent on. Petrosian and Kramnik seem to win more games using passed pawns than any other GMs I can think of. This game shows that Rybka understands this strategy as well. Position comes first, material second -- Capablanca
Yes, I agree -- Rybka 2.2
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| Nov-24-06 | | whatthefat: Are all these impressive Rybka wins being submitted to the database? At the moment there are only 31 games. |
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| Nov-25-06 | | Dionyseus: Here's something interesting I learned about Rybka this evening. According to Rybka's author, Vasik Rajlich, here's how Rybka calculates evaluations: % to win , advantage in centipawns
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55 ----------------> 22
60 ----------------> 43
65 ----------------> 64
70 ----------------> 86
75 ----------------> 107
80 ----------------> 129
85 ----------------> 151
90 ----------------> 189
95 ----------------> 241
In other words, an eval of +1.07 means that Rybka thinks it has a 75% chance of winning the game. |
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| Nov-26-06 | | notyetagm: Rybka eval, please, for the following position with Black to play:
click for larger viewThis is a variation given by Kasparov/Greengard as possibly White's best winning attempt in Game 1 of the Deep Fritz - Kramnik match. The variation runs 30. e3 ♗c5 31. ♔f3 b5 32. ♔e2 e4 33. ♔d2 ♔g6 34. ♘c7 b4 35. ♘d5 ♔g5 36. h3 h6 37. ♘f4 ♗d6 38.♔c2 h5 39. ♘g2. |
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| Nov-26-06 | | Dionyseus: <notyetagm>
Analysis by Rybka 2.2 mp:
39...Bc5 40.Kb3 Be7 41.Kc4 Bf8 42.Kd5 Be7 43.Nh4 Bf8 44.Kc6 Kf6 45.Kd7 b3 46.axb3
± (0.82) Depth: 23 00:05:35 112mN
from 42.Kd5:
click for larger viewAnalysis by Rybka 2.2 mp:
42...Bg7 43.Kd6 Kg6 44.Nf4+ Kh6 45.Ke7 Bc3 46.Kxf7 Be1 47.Kf6 Bxf2 48.Kxf5 Bxg3 49.Ne6
± (0.89) Depth: 21 00:00:47 15602kN
from 43...Kg6:
click for larger viewAnalysis by Rybka 2.2 mp:
44.Nf4+ Kh6 45.Ke7 Bc3 46.Kxf7 Be1 47.Kf6 Bxf2 48.Kxf5 Bxg3 49.Ne6 Bb8 50.Kxe4 Ba7
± (1.06) Depth: 21 00:02:22 49461kN
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| Nov-26-06 | | notyetagm: <Dionyseus> Thanks
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| Nov-26-06 | | Dionyseus: <notyetagm> Keep in mind though that it's not certain whether Kasparov's line is perfect play, perhaps black has a better defense. I haven't looked at that yet. |
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| Nov-26-06 | | notyetagm: <Dionyseus> Understood. It's just Kasparov and Mig's first cut at a White winning attempt and a Black defense. |
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| Nov-28-06 | | Strelz: I just downloaded the demo a couple of days ago and I can't get the opening book to work on my Fritz Interface. Can anybody help me out maybe? |
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| Nov-28-06 | | Stellar King: Just wondering ...is it possible to teach a savant complex logrithms and algorithms so he/she will play like a computer?!?!!?!? |
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| Nov-28-06 | | TefthePersian: <Stellar King>: "Just wondering ...is it possible to teach a savant complex logrithms and algorithms so he/she will play like a computer?!?!!?!?" The chess knowledge in a computer is backed up by a calculation speed that dwarfs human capacity. |
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| Nov-28-06 | | Stellar King: <TefthePersian>, do you KNOW what idiot savants can do .... here is a defenition if you don't know: http://dictionary.reference.com/sea... |
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| Nov-28-06 | | thegoodanarchist: Can anyone tell me about Rybka in comparison to other engines? I've seen posts that claim Rybka is much stronger than Fritz 10, for example. Does anyone have objective comparisons for several chess programs running on the same processor(s)? |
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| Nov-29-06 | | spinal pat: Yes, that would be interesting Stellar King.
Tef the Persian I think if you could use the brain as a computer to calculate, it would dwarf every computer known to man, and that for many years to come. |
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| Nov-29-06 | | Loisp: <thegoodanarchist> http://web.telia.com/~u85924109/ssdf/ |
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| Nov-29-06 | | percyblakeney: ...and here's one more rating list, giving the difference between the latest Rybka and Fritz as 175 points: http://www.husvankempen.de/nunn/40_... |
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| Nov-29-06 | | alicefujimori: <thegoodanarchist><I've seen posts that claim Rybka is much stronger than Fritz 10, for example.>Well, since Deep Fritz is definitely stronger than Fritz 10 and in the 2 games so far Rybka had shown moves bette than the ones that DF 10 played against Kramnik, I think we can pretty much assume that Rybka is stronger than Fritz 10. Not to mention that DF 10 ran on a Duo Core while Rybka ran on a normal PC. Anyway, according to the results and ratings of Rybka, I think we can pretty much assume that Rybka is the strongest program at the moment. If you want to know more about its comparisons to other engines, please check out the rybka forum at www.rybkaforum.com. |
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| Nov-29-06 | | square dance: i can also add that my single processor version of rybka seems to be giving evals more in line with GM commentary than what deep fritz 10 is reported to be showing during the games. |
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| Nov-29-06 | | notyetagm: And according to that www.rybkaforum.com, it looks like Rybka may have some -serious- competition in the near future. The new versions of Spike (Spike 1.3X4), Hiarcs (Hiarcs 11 beta), and Fruit (Fruit-Leiden) seem to be -incredibly- strong. Only time will tell if they are as strong or stronger than Rybka, the new gold standard. |
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Nov-29-06
 | | WannaBe: This, maybe a breakthrough in the 'golden age' of chess software, where one side tries to out-do the other. There were ship-yard builders that built the fastest ocean liners, planes that flew faster than another, and races of motor vehicles to break new land records. People, in my own very limited knowledge, and opinion, one day, chess will be proven to be a drawn game, if played correctly. (But I have no idea when that day is...) |
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