Author: Richard Pijl
Date: 23:08:40 02/15/04
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On February 15, 2004 at 17:36:20, Jaime Benito de Valle Ruiz wrote: >On February 15, 2004 at 16:31:35, Richard Pijl wrote: > >>In the final round of IPCCC The Baron played with black against Comet. The Baron >>did scare me by playing Nxd4 in the position below. However, it turned out to be >>correct and the Baron won the resulting endgame. >> >>[D] 3r2k1/pb3qbp/1pnrp3/1B3p2/Q2P4/4B3/P3NPPP/1R1R2K1 b - - 3 23 >> >>Full game: >> >>[Event "IPCCC"] >>[Site "Paderborn"] >>[Date "2004.02.15"] >>[Round "7"] >>[White "Comet"] >>[Black "The Baron"] >>[Result "0-1"] >>[ECO "D86"] >>[Opening "Gruenfeld"] >>[Variation "Exchange, Simagin's improved Variation"] >> >>1.c4 Nf6 2.d4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Nc6 >>9.O-O b6 10.Bd3 Bb7 11.Bg5 Qd7 12.Qd2 Rfd8 13.Rfd1 f6 14.Bf4 e6 15.Rab1 Qf7 >>16.Be3 Rd6 17.Qc2 Rad8 18.c4 R6d7 19.c5 >>f5 20.exf5 gxf5 21.cxb6 cxb6 22.Bb5 R7d6 23.Qa4 Nxd4 24.Rxd4 Bxd4 25.Bxd4 Qg6 >>26.f3 Bxf3 >>27.Nf4 R6xd4 28.Qxd4 Rxd4 29.Nxg6 Be4 30.Ne7+ Kf8 >>31.Nxf5 Bxf5 32.Rc1 Rb4 33.Bf1 a5 34.Rc3 Rb2 35.a3 Ke7 36.Bd3 Bxd3 37.Rxd3 Kf6 >>38.Rf3+ Ke5 39.Rh3 Ra2 40.Rxh7 Rxa3 41.Rh5+ Kd6 42.Rb5 Kc6 43.Re5 Ra1+ 44.Kf2 >>Kd6 45.Rb5 Kc6 46.Re5 a4 47.Rxe6+ Kc5 >>48.Re5+ Kb4 49.Re4+ Ka5 50.h3 a3 51.Re7 a2 0-1 > >Interesting position. >Some programs can find it within a minute or two in my computer (1800XP+), but >Shredder 7 doens't see it after 5 minutes in "infinite analysis". >Ruffian 1.05, Hiarcs 9, and Shredder 8. need about a minute, more or less. >Fritz 8 finds it in 13 seconds, then it drops it, and comes back to it after a >minute, like the others. >Some other amateur engines that I've tried seem to find it harder. >How long did it take to yours? (was it pondering?) I just checked the logfile. The Baron was playing on an AMD MP 2000+ (dual) and needed about 4 minutes (including pondering) to select Nxd4. I have not yet checked it from a clean hash situation, but will do that this evening (with the single CPU version). Richard. > > Jaime
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