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Rybka (Computer) vs Shredder (Computer)
"Shredded" (game of the day Jul-03-2009)
WCCC Pamplona Openclass (2009), rd 6, May-13
Spanish Game: Berlin Defense. Rio Gambit Accepted (C67)  ·  1-0



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Given 18 times; par: 35 [what's this?]

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sac: 20.Rxe6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  Moondoll: Black moves the Queen 13 times in this game but neither the Queen's Rook nor Bishop even once.
Jul-03-09  MostlyAverageJoe: My Hiarcs wanted to play 20...dxe6 instead of 20...Qxe6?

It does not seem that white has a quick win after that response.

Jul-03-09  Jason Frost: Rybka reminds me of Tal. You don't let Tal get a lead in development and you don't let Rybka get a lead in development.

And 23. g3!, just the calm, I'm down material, so what? Tal.

Jul-03-09  dTal: Indeed Jason. Except that Rybka has healthy transistors as opposed to poor old Tal's withered kidneys!
Jul-03-09  kellmano: Wow. What an incredible game. It's kind of nice to think that this is the 'right' way to play chess.
Jul-03-09  VaselineTopLove: <Only a cynic could fail to enjoy some of Rybka's best games.>

The only reason we seem to enjoy Rybka's games against other machines is that these other computers are below Rybka's playing strength and as such are like humans, even though they may play better than many humans.

We wouldn't have such games if Rybka had been pitted against its exact equal.

Premium Chessgames Member
  Richard Taylor: It doesn't say when Rybka won the World Champs!

Tal probably didn't keep himself very fit he smoked a lot also, I believe, and drank quite a bit. Maybe those things contributed to his kidney illnesses? Of course sometimes these things just happen. It was unfortunate he was so ill - so many tournies he had to withdraw from even in the 70s.

Also Korchnoi, his rival, was unfortunate in the way things went for him in Russia.

Jul-03-09  Landman: This game has a number of astonishing moves (11.Qd1, 19.Nd5, 22.Rxh7).
Jul-03-09  smalldreams: This game is inhuman.
Jul-03-09  Samagonka: I remember watching this game in Pamplona. Shredder went red with rage after the defeat and refused to shake Rybka's hand.
Jul-03-09  WhiteRook48: incredible sacs
Jul-03-09  psmith: Some analysis of MAJ's excellent suggestion of 20... dxe6 would be appreciated!
Jul-03-09  Emma: Wow! Amazing game.
Jul-03-09  ajile: lol

Black has no development and then takes 21..Qxa2. Seriously weak play by Shredder.

Jul-03-09  psmith: So... I spent some time with 20...dxe6 and Fritz 5.32. I came up with the following lines, all eventually good for White, I think. But I am unsure of all this:

20... dxe6 21. Nf4 and now:

(a) 21...Qf6 22. Rxh7 Rd8 (22... g5 23. Bc3 Bd4 24. Bxd4 Qxd4 25. Qh6) 23. Bd3 g5 24. Bc3 Bd4 25. Bxd4 Rxd4 26. Rh6 Qg7 27. Qh5 Rxf4 28. Rg6 Rg4 29. Rxg7+ Kxg7 30. h3 Ra4 31. Qxg5+ Kf7 32. Be2

(b) 21... Qg5 22. Rxh7 Qg4 23. Bc3 Bxf2+ 24. Kxf2 Qxf4+ 25. Kg1 Qc1+ 26. Bf1 Qg5 27. Rxg7+ Qxg7 28. Bxg7 Kxg7 29. Qg3+ Kf6 30. h4 Rf7 31. Qg5+ Ke5 32. h5

(c) 21... Qe8 22. Rxh7 cxb5 23. Rh8+ Kf7 24. Qh5+ Ke7 25. Ng6+ Kd8 26. Qh4+ Kc7 27. Nxf8 Bxf8 28. Qg3+ e5 29. Bb4

Premium Chessgames Member
  eternaloptimist: Shredder has won 11 World Championships in normal time controls, blitz etc. from 1996 to 2007, but Rybka made beating it look easy. At 1 time Shredder dominated computer chess tournaments, but now there's no doubt that Rybka has usurped that distinction from it. Shredder made too many ♕ moves & paid the price for it. Rybka got a big development advantage because of that & mustered up a quick attack. Rybka played a few very good moves in this game.: 11.♕d1, 19.♘d5 & 20.♖xe6 (to get control of the f4 square for its ♘ & thereby preventing Shredder's ♕ from moving to g6 to protect its h-♙). At the end of the game Shredder still hadn't moved its ♕side ♖ & ♗, whereas Rybka made effective use of its pieces. This is a very impressive win by Rybka.
Premium Chessgames Member
  Gregor Samsa Mendel: Shredder was probably expecting 10 Bd2, as played in T L Petrosian vs Ara Minasian, 2006, and had probably prepared a novel reply. However, Rybka, no doubt also familiar with this brilliant game, prevented Shredder from employing its opening novelty by playing 10 Nc3 instead. Brilliant psychological play by Rybka.
Premium Chessgames Member
  Richard Taylor: <Gregor Samsa Mendel> Are talking about Genet Kafaka Rybka? The reclusive French/Czech writer, chess player, part time musician and pea plant experimenter?
Premium Chessgames Member
  Gregor Samsa Mendel: No, I was thinking of his brother, "Silicon Tigran" Rybka.
Jul-04-09  Kinghunt: 19. Nd5!and 23. g3! are brilliant, long-term plans that seem far too human. 20...dxe6 is a stronger defense though.
Jul-06-09  kevin86: A pirate was shredding his old files when his parrot fell into the machine: The result-Shredded Tweet.
May-23-10  HumbleSoul: I wonder whether 16...Nd4 is playable. I won with this variation against Shredder 12:

16. Bd2 Nd4
17. Qd3 f5
18. Bc4+ d5
19. Bxd5+ Be6
20. Rxd4 Bxd4
21. Re1 Bxf2+
22. Kxf2 Qxh2
23. Qh3 Qxh3
24. gxh3 Bxd5

Granted, my Shredder 12 was set to ~1500 ELO, so it missed what I think is the winning move 23.Bxe6+. But it still seems like it might be a more promising line than what Shredder played in the game.

Jun-03-10  NARC: Is 22. Bf1 OK for white?
Premium Chessgames Member
  maxi: <NARC> It is a remarkable fact, which shows how delicate chess logic is, that the natural 22.Bf1 does not work for White. The simple move 22...h6 stops White`s attack. But there is another reason why it is better to leave the b5 Bishop where it is: Black's main counterattack comes from the possibility of moving the Q to the first rank, then playing b6 and Ba6. After Black takes the White Bishop at b5, it own Pawn will impede this plan.
Premium Chessgames Member
  maxi: This game shows how computers can play what would be called "deep" chess, if a human being had been playing. The idea of 19.♘d5 followed by the Rook sacrifice followed by 21.♘f4 is amazing!
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