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Subject: Re: Great tactical postion, gives most engines a hard time

Author: Richard Pijl

Date: 03:00:28 11/03/04

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On November 02, 2004 at 19:27:03, robert flesher wrote:

>[D] 2r1bq1k/2r2p1P/1p2pPp1/p2pP1N1/3P4/nPP5/R2Q2K1/2RN4 w - - 0 42
>
>White to move and win with Rxa3

The Baron 1.5.0, Xeon 2.8 100Mb hash:
 ply       time        nodes   score  pv
  5( 9)&   0:00.06     11219   +1.04  Kg2-f1 Be8-b5 Kf1-f2 Bb5-e8 Rc1-a1
                                      Na3-b5
  5(10)&   0:00.09     18856   +1.19  Kg2-g1 a5-a4 Qd2-b2 Qf8-h6 Qb2-g2
  5(10).   0:00.16     36396   +1.19  Kg2-g1 a5-a4 Qd2-b2 Qf8-h6 Qb2-g2
  6( 9)&   0:00.19     45885   +1.17  Kg2-g1 a5-a4 Qd2-b2 Na3-b5 Ra2xa4
                                      Qf8-h6
  6(11)&   0:00.27     65727   +1.21  Kg2-f1 Na3-b5 Ra2-a1 Be8-d7 Qd2-e3
                                      Bd7-e8
  6(12).   0:00.34     93866   +1.21  Kg2-f1 Na3-b5 Ra2-a1 Be8-d7 Qd2-e3
                                      Bd7-e8
  7(12)&   0:00.64    179046   +1.30  Kg2-f1 Be8-b5 Kf1-e1 Bb5-a6 Qd2-g2
                                      Ba6-d3 Ra2-d2 Bd3-e4
  7(13).   0:00.86    247885   +1.30  Kg2-f1 Be8-b5 Kf1-e1 Bb5-a6 Qd2-g2
                                      Ba6-d3 Ra2-d2 Bd3-e4
  8(13)&   0:02.70    775031   +0.83  Kg2-f1 b6-b5 Ra2-a1 b5-b4 c3xb4
                                      Qf8xb4 Rc1xc7 Rc8xc7 Qd2xb4 a5xb4
  8(15).   0:06.11   1801237   +0.83  Kg2-f1 b6-b5 Ra2-a1 b5-b4 c3xb4
                                      Qf8xb4 Rc1xc7 Rc8xc7 Qd2xb4 a5xb4
  9(14)&   0:07.17   2127261   +0.77  Kg2-f1 b6-b5 Rc1-a1 b5-b4 Qd2-h2
                                      b4xc3 Nd1xc3 Rc7xc3 Ra2xa3
  9(15)&   0:09.08   2719419   +0.78  Ra2-a1 b6-b5 Kg2-g1 b5-b4 c3xb4
                                      Qf8xb4 Qd2xb4 a5xb4 Rc1xc7 (Rc8xc7)
  9(15)&   0:10.38   3122341   +0.96  Nd1-b2 b6-b5 Nb2-d3 b5-b4 c3xb4
                                      Rc7xc1 Nd3xc1 Qf8xb4 Qd2xb4 a5xb4
  9(16).   0:14.88   4515945   +0.96  Nd1-b2 b6-b5 Nb2-d3 b5-b4 c3xb4
                                      Rc7xc1 Nd3xc1 Qf8xb4 Qd2xb4 a5xb4
 10(15)&   0:17.09   5265593   +0.48  Nd1-b2 Rc7xc3 Rc1xc3 Na3-b1 Rc3xc8
                                      Nb1xd2 b3-b4 a5-a4 Ra2xa4 Nd2-e4
 10(16)&   0:20.53   6339308   +0.78  Kg2-f1 b6-b5 Qd2-e3 b5-b4 Ra2-b2
                                      Na3-b5 Rb2-c2 b4xc3 Nd1xc3 Qf8-b4 Nc3-a2
 10(16)&   0:24.70   7620893   +1.07  Ra2-a1 b6-b5 Kg2-g1 b5-b4 c3xb4
                                      Qf8xb4 Qd2xb4 a5xb4 Rc1xc7 Rc8xc7 Nd1-e3
 10(17).   0:33.17  10413790   +1.07  Ra2-a1 b6-b5 Kg2-g1 b5-b4 c3xb4
                                      Qf8xb4 Qd2xb4 a5xb4 Rc1xc7 Rc8xc7 Nd1-e3
 11(16)&   0:39.22  12403099   +0.76  Ra2-a1 b6-b5 Kg2-g1 b5-b4 c3xb4
                                      Rc7-c2 Rc1xc2 Rc8xc2 Qd2-e3 Qf8xb4 Nd1-f2
 11(17)+   0:59.00  18866592   +1.38  Ng5-f3 (Be8-d7) (Ra2xa3) (Qf8xa3) (b3-b4)
 11(17)&   1:00.78  19434505   +1.35  Ng5-f3 Na3-b5 Kg2-g1 Be8-c6 Nf3-g5
                                      Bc6-e8 Kg1-f1 Rc7-c6 Kf1-f2 Nb5-a3 Kf2-f1
 11(18).   1:05.75  21052139   +1.35  Ng5-f3 Na3-b5 Kg2-g1 Be8-c6 Nf3-g5
                                      Bc6-e8 Kg1-f1 Rc7-c6 Kf1-f2 Nb5-a3 Kf2-f1
 12(17)&   1:16.09  24418226   +1.34  Ng5-f3 Na3-b5 Kg2-g1 Be8-c6 Nf3-g5
                                      Bc6-e8 Kg1-f1 Rc7-c6 Qd2-e3 Rc6-c7 Ra2-a1
                                      Rc7-c6
 12(19).   1:23.52  27156203   +1.34  Ng5-f3 Na3-b5 Kg2-g1 Be8-c6 Nf3-g5
                                      Bc6-e8 Kg1-f1 Rc7-c6 Qd2-e3 Rc6-c7 Ra2-a1
                                      Rc7-c6
 13(20)&   1:37.70  32148790   +1.34  Ng5-f3 Na3-b5 Kg2-g1 Be8-c6 Nf3-g5
                                      Bc6-e8 Kg1-f1 Nb5-a3 Qd2-e3 b6-b5 Ra2-a1
                                      b5-b4 Qe3-h3 (b4xc3) (Nd1xc3) (Na3-b5)
 13(20)+   2:25.80  47910821   +1.68  Ra2xa3 (Qf8xa3) (b3-b4) (a5xb4) (Ng5-e4)
 13(21)&   2:44.25  53931093   +3.03  Ra2xa3 Qf8xa3 b3-b4 Be8-b5 Ng5-f3
                                      Qa3xc1 Qd2xc1 Kh8xh7 Qc1-g5 Rc8-h8 b4xa5
                                      b6xa5 Kg2-f2 (a5-a4)
 13(21).   2:45.92  54580807   +3.03  Ra2xa3 Qf8xa3 b3-b4 Be8-b5 Ng5-f3
                                      Qa3xc1 Qd2xc1 Kh8xh7 Qc1-g5 Rc8-h8 b4xa5
                                      b6xa5 Kg2-f2 (a5-a4)



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