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Rybka (Computer) vs Diep (Computer)
WCCC 2006 (2006), Turin, rd 2, May-26
Sicilian Defense: Najdorf. Zagreb (Fianchetto) Variation (B91)  ·  1-0



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sac: 49.f4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Premium Chessgames Member
  offramp: 49.f4 was either a blunder or a very far-seeing sacrifice.
May-28-06  Veryrusty: <Offramp: very far-seeing sacrifice> I vote for far-seeing sacrifice. It's purely combinative and there weren't that many nodes to calculate. Heck, *I* might even have found it! (Dream on.)
May-31-06  Montreal1666: How could it be a blunder if it wins the game????
May-31-06  Milo: Certainly within the computer's horizon.
Jun-01-06  dehanne: White easily gets 2 connected passed pawns for the piece. Doesn't look so difficult.
Jun-02-06  XMarxT3hSpot: I'm kinda surprised with 23.Nxd6

And how the knight escape from the pin...Good job Rybka!

Premium Chessgames Member
  Richard Taylor: The blunder was possibly 49 ... f5

Better (perhaps) 49 ... Nc4+ 50 Ke4 Nd3+ 51 Kf3 Kd5 and if 52 fxe5 Kxe5

Then the Black Knight goes for b6 and Black may have had a draw.

That's just my quick take on it...

Premium Chessgames Member
  Richard Taylor: Black could also have tried a pawn sac with 19..f5
Jun-09-07  get Reti: Notice how Rybka moves the king's knight 10 times by move 30. I like the Nb3-d2-f1 manuever. It looks awkward at fist, but then after Nf1-e3-c4, it attacks the weak d pawn. Think rybka thought that far ahead?
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