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Subject: Re: 2 very difficult and wild tactical combinations which programs can't see

Author: Dann Corbit

Date: 12:10:02 11/02/01

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Second problem:
[D]r1bq1r2/p2np1k1/3p2R1/3pP3/2pP4/5N2/PP2Q1P1/2KR1B2 b - - c0 "after Rxg6+";
Stored 8 learned positions into hash table
solution
no solutions
usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
         9   0.001   3.98  1t  1...Kxg6 {500}
        12   0.002   3.98  1.  1...Kxg6 {500}
       150   0.003   3.91  2t  1...Kxg6 2.e6 {500}
       169   0.003   3.91  2.  1...Kxg6 2.e6 {500}
      1122   0.006   3.89  3t  1...Kxg6 2.e6 Nf6 {500}
      1138   0.007   3.89  3.  1...Kxg6 2.e6 Nf6 {500}
      6175   0.019   3.67  4t  1...Kxg6 2.e6 Nf6 3.g3 {500}
      6191   0.020   3.67  4.  1...Kxg6 2.e6 Nf6 3.g3 {500}
     74113   0.191   3.27  5-- 1...Kxg6 2.Nh4+ Kg7 3.Qg4+ Kf7 4.e6+ Kf6 5.exd7
                               Rf7 {160}
     79105   0.206   2.60  5t  1...Kxg6 2.Nh4+ Kh6 3.Qd2+ Kh7 4.Qc2+ Kh8
                               5.Ng6+ Kg8 6.Nxf8 Qxf8 {340}
     79188   0.208   2.60  5.  1...Kxg6 2.Nh4+ Kh6 3.Qd2+ Kh7 4.Qc2+ Kh8
                               5.Ng6+ Kg8 6.Nxf8 Qxf8 {340}
    130462   0.310   2.60  6t  1...Kxg6 2.Nh4+ Kh6 3.Qd2+ Kh7 4.Qc2+ Kh8
                               5.Ng6+ Kg8 6.e6 Nf6 7.Nxf8 {0}
    130560   0.312   2.60  6.  1...Kxg6 2.Nh4+ Kh6 3.Qd2+ Kh7 4.Qc2+ Kh8
                               5.Ng6+ Kg8 6.e6 Nf6 7.Nxf8 {0}
    236279   0.560   2.20  7-- 1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Bxc4 Nxe5
                               5.dxe5 Kg7 {160}
    454988   1.009   2.20  7t  1...Kxg6 2.Nh4+ Kh6H 3.Qe3+H Kh7H 4.Qg5H {500}
    467499   1.042   2.20  7.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 {500}
   1562859   3.371   2.04  8t  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Bxc4 Qc7
                               5.Qd3+ Kh8 6.Ng6+ Kg7 7.Nxf8 Qxc4+ 8.Qxc4 dxc4
                               {270}
   1577183   3.424   2.04  8.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Bxc4 Qc7
                               5.Qd3+ Kh8 6.Ng6+ Kg7 7.Nxf8 Qxc4+ 8.Qxc4 dxc4
                               {270}
   4516524   9.969   1.64  9-- 1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Qe8 5.Nf5
                               Rxf5 6.Bd3 Qf8 7.Bxf5+ Qxf5 8.Qxf5+ Kg7 {-311}
   6870395  14.911   1.62  9t  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nxe5H
                               5.Bxc4H {HT}
   6956188  15.149   1.62  9.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nxe5 5.Bxc4
   7419530  16.346   1.22 10-- 1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nxe5
                               5.dxe5 Rxf1 6.Rxf1 e6 7.Qxd8 c3 {-911}
  17342147  36.225   0.76 10t  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nf6 5.exf6
                               Rxf6 6.Qxd5 Rb8 7.Bxc4 Rf2 8.Qh5+ Kg7 {80}
  17704120  37.193   0.76 10.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nf6 5.exf6
                               Rxf6 6.Qxd5 Rb8 7.Bxc4 Rf2 8.Qh5+ Kg7 {80}
  55773784  1:56.1   0.79 11t  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nf6 5.Nf5
                               Bxf5 6.Qxf5+ Kg7 7.exf6+ Rxf6 8.Qxd5 e6 9.Qg5+
                               Kf8 10.Bxc4 Rc8H {HT} {70}
  56542401  1:58.2   0.79 11.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nf6 5.Nf5
                               Bxf5 6.Qxf5+ Kg7 7.exf6+ Rxf6 8.Qxd5 e6 9.Qg5+
                               Kf8 10.Bxc4 Rc8 {HT} {70}
  61233637  2:10.5   0.39 12-- 1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nf6 5.Nf5
                               Bxf5 6.Bd3 Kh8 7.exf6 Bh7 8.fxe7 Rf7 9.exd8=Q+
                               Rxd8 {-501}
 156445198  5:22.5   0.00 12t  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nxe5
                               5.dxe5 e6 6.Qg6+ Kh8 7.Qh6+ Kg8 8.Ng6 Bd7
                               9.Qh8+ Kf7 10.Qh7+ Ke8 11.Nxf8 Kxf8 12.Qh8+ Kf7
                               13.Qh7+ Ke8 {HT} {80}
 160514334  5:34.0   0.00 12.  1...Kxg6 2.Nh4+ Kh6 3.Qe3+ Kh7 4.Qg5 Nxe5
                               5.dxe5 e6 6.Qg6+ Kh8 7.Qh6+ Kg8 8.Ng6 Bd7
                               9.Qh8+ Kf7 10.Qh7+ Ke8 11.Nxf8 Kxf8 12.Qh8+ Kf7
                               13.Qh7+ Ke8 {HT} {80}



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