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Argonaut (Computer) vs Rybka (Computer)
6th International CSVN Tournament (2006), Leiden NED, rd 1, May-05
Sicilian Defense: Modern Variations (B50)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
May-10-06  Manu2: What's the point of Qc1? Time wasting? Isn't it. I am failing to see any value.
May-13-06  ReikiMaster: 38...f3 is very interesting. If white replies 39.gxf3, can black afford to expose his King to checks by taking the aggessive line 39...Rxa5 threatening Ra1+ and Ra2 trapping white Queen?
May-13-06
Premium Chessgames Member
  pawn to QB4: Interesting question. 39...Rxa5 threatens Ra1+ and Qg1# so White'd have to proceed with checks: 40.Qe7+ Kc6 (Kb6 41.Rb8+ Kc6 42.Rc8+ transposes even if White has nothing better); 41.Rc8+ Kb5 (or b6 42.Rb8+ repeats) 42. Qe8+ wins Q for R although that b-pawn's dangerous. So, these lines probably ending in draws at best, I suggest that, if Black and trying for a win you go 39...Qxd3 and the checks peter out soon: after, say, 40. Re7+ Kc6 41.Qe6+ Kb5 42. Rb7+ Ka4 heading to a2. In general 39...Rxa5 looks like the sort of move a computer might be brave enough to play, but as a mere human I'd keep Q and R centralised and guarding each other in a position like this.
Aug-24-06  spirit: <manu2> me think 7.Qc1 was preparation for 9.Qh6 although me haven't seen this variation of the najdorf before now. <ReikiMaster> me didn't see 39...Rxa5 immediately...real nightmare for whyte!!!

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