Author: John Stanback
Date: 12:45:45 03/09/99
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On March 09, 1999 at 02:55:58, Steffen Jakob wrote: >Hi! > >Today Hossa lost a game in the following position because he didn't take care >enough of his king: > >4r1k1/1Bpq1ppp/1bNp4/P3p3/3PPnb1/2P5/2Q2PPP/4RRK1 b > >Hossa had white against "blunite" and the last move was a5? Black won with Bf3!! >How long does your program take to see that Bf3!! is winning (or does it find an >even better move?)? Here is the analysis of Hossa: > >depth value time nodes pv > 1 -890 0.02 21 1... d7xc6 2.b7xc6 > 1 -441 0.04 99 1... f4xg2 2.g1xg2 > 2 -441 0.06 650 1... f4xg2 2.g1xg2 >! 3 -310 0.10 1769 1... f4xg2 2.g1xg2 g4h3 3.g2g1 h3xf1 4.e1xf1 > 4 -337 0.60 27560 1... e5xd4 2.c3xd4 f4xg2 3.g1xg2 g4h3 4.g2g1 h3xf1 > 5.e1xf1 > 5 -333 0.80 37229 1... e5xd4 2.c3xd4 f4xg2 3.g1xg2 g4h3 4.g2h1 h3xf1 > 5.e1xf1 > 6 -370 2.33 125529 1... e5xd4 2.c3xd4 f4xg2 3.e1c1 b6xd4 4.g1xg2 > 6 -326 8.53 483797 1... f4xg2 2.e1b1 g2f4 3.f1e1 f4e2 4.e1xe2 g4xe2 > 5.c2xe2 > 7 -347 12.55 706240 1... f4xg2 2.e1b1 g2f4 3.f1e1 f4h3 4.g1f1 e5xd4 > 5.a5xb6 >! 7 -120 48.09 2540272 1... g4f3 2.h4 f3xg2 3.a5xb6 c7xb6 4.c6xe5 d6xe5 > 8 -97 1:00 3240537 1... g4f3 2.b7c8 d7xc6 3.d5 f3xe4 4.e1xe4 f4xd5 > 5.a5xb6 e8xc8 >! 9 80 7:17 24749284 1... g4f3 2.h3 f3xg2 3.a5xb6 g2xf1 4.e1xf1 c7xb6 > 5.d4xe5 d7xb7 >! 10 171 20:04 66462256 1... g4f3 2.h3 f3xg2 3.e1e3 g2xf1 4.g1xf1 b6xa5 > 5.f1g1 a5b6 > >BTW: the blitz game ended with > > 24. a5 Bf3 > 25. dxe5 Qg4 > 26. Ne7+ Rxe7 > 27. axb6 Qxg2# > > > >Greetings, >Steffen. Zarkov takes less than a second to choose Bf3, but over 17 seconds to get a positive score. Here the output, P2-300: 00:01.0 35200 4> -272 Bf3 gxf3 Qh3 axb6 Qg2+ 00:01.4 46208 4 -187 Bf3 h4 Bxg2 axb6 Bxf1 Kxf1 cxb6 00:01.4 46776 5> -187 Bf3 h4 Bxg2 axb6 Bxf1 Kxf1 cxb6 00:03.6 120587 5 -114 Bf3 h4 Bxg2 axb6 Bxf1 Rxf1 Qg4+ Kh2 exd4 bxc7 00:03.6 120700 5 -115 Bf3 h4 Bxg2 axb6 Bxf1 Rxf1 Qg4+ Kh2 exd4 bxc7 00:03.6 121136 5 -205 Bf3 h4 Bxg2 axb6 Bxf1 Rxf1 Qg4+ Kh2 exd4 bxc7 00:07.2 237759 5 -24 Bf3 h4 Bxg2 axb6 Bxf1 Rxf1 Qg4+ Kh2 Qxh4+ Kg1 00:11.3 377600 5 -23 Bf3 Bc8 Rxc8 gxf3 Qh3 Ne7+ Kf8 Ng6+ hxg6 axb6 00:11.7 392757 6> -23 Bf3 Bc8 Rxc8 gxf3 Qh3 Ne7+ Kf8 Ng6+ hxg6 axb6 00:17.6 594944 6 3 Bf3 h3 Bxg2 f3 Bxf1 Rxf1 Qxh3 axb6 Qg3+ Kh1 <HT> 00:18.2 626868 7> 3 Bf3 h3 Bxg2 f3 Bxf1 Rxf1 Qxh3 axb6 Qg3+ Kh1 <HT> 00:32.4 1094394 7 53 Bf3 h3 Bxg2 f3 Qxh3 axb6 Qg3 Qxg2 Nxg2 00:45.1 1494912 7 103 Bf3 h3 Bxg2 f3 Qxh3 axb6 Qg3 Ne7+ Rxe7 00:46.5 1565383 8> 103 Bf3 h3 Bxg2 f3 Qxh3 axb6 Qg3 Ne7+ Rxe7 01:41.2 3331734 8 165 Bf3 h3 Nxh3+ Kh2 Nf4 axb6 Bxg2 Kg1 Bxf1 Rxf1 Qg4+ John
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