Author: George Sobala
Date: 13:39:22 07/06/02
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On July 06, 2002 at 15:22:41, John Merlino wrote: >On July 06, 2002 at 14:48:52, George Sobala wrote: > >>Topalov v Lutz >> >>How long does it take for your engine to find Nxf6? >> >>Live on the ICC, I happened to have Gambit Tiger analyzing on aggressive mode on >>a humble K6-2 450Mhz and it found the winning line *immediately*, whereas other >>engines I tried subsequently such as Fritz7 and Hiarcs8 were struggling even >>after several minutes on a Duron 800Mhz. >> >>[D]1r4k1/1q3pp1/r3b2p/p2N4/3R4/QP3P2/2P3PP/1K1R4 w - - > >I assume you mean Nf6+ rather than Nxf6? If so, then Chessmaster 9000 sees it in >1:37 on a (relatively slow) PIII-600: > >Time Depth Score Positions Moves >0:00 1/3 1.58 1515 1.Qc5 Bxd5 2.Rxd5 Re8 >0:00 1/4 1.81 6765 1.Qc5 Qb5 2.Rc4 Qxc5 3.Rxc5 Bxd5 > 4.Rdxd5 >0:00 1/5 1.67 33581 1.Qc5 Kh8 2.Nc7 Rc6 3.Rd8+ Rxd8 > 4.Rxd8+ Kh7 >0:01 1/6 1.53 92375 1.Qc5 Kh8 2.Qc3 Rc8 3.Rc4 Rac6 > 4.Rxc6 Qxc6 5.Qxc6 Rxc6 >0:03 1/7 1.50 222972 1.Qc5 Kh8 2.Qc3 Bf5 3.Kb2 Re8 4.Re1 >0:09 1/8 1.42 694778 1.Qc5 Kh8 2.Qc3 Rc6 3.Qd3 Rbc8 > 4.Nf4 Qb8 5.c4 >0:37 1/9 1.49 2926516 1.Qc5 Kh7 2.Qc3 Rc6 3.Qd3+ g6 4.g4 > Rbc8 5.Rd2 Bxd5 6.Rxd5 >1:19 2/10 1.39 6403907 1.Qc5 Kh7 2.Qc3 Rc6 3.Qd3+ g6 4.g4 > Rbc8 5.Rd2 f5 6.Re2 Bxd5 7.Rxd5 >1:37 2/10 3.06 8039436 1.Nf6+ gxf6 2.Rd8+ Rxd8 3.Rxd8+ > Kh7 4.Qf8 Kg6 5.Qg8+ Kh5 6.Qg7 > f5 7.Rd4 Bc8 8.g3 Qe7 9.Rh4+ Qxh4 > 10.Qxf7+ Rg6 11.gxh4 >2:28 3/11 3.12 13185138 1.Nf6+ gxf6 2.Rd8+ Rxd8 3.Rxd8+ > Kh7 4.Qf8 Kg6 5.Qg8+ Kh5 6.Qg7 > f5 7.Rd4 Bc8 8.g3 Qe7 9.Rh4+ Qxh4 > 10.Qxf7+ Rg6 11.gxh4 Be6 12.Qc7 > >jm Yes - Nf6+ (sorry, misprint - over-enthusiasm triumphed over typing) For the record, Gambit Tiger (aggressive) got it in 0.4 secs on a Duron 800! It was fun watching it live at the ICC: for many, it was not an easy line to visualise even with computer prompting. I was puzzled that (on a slow processor) I seemed to be the first to point it out, but obviously Gambit/aggressive spots this particular sac much sooner than other engines.
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