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Subject: Re: Challenge position for engines! (Lots of luck)

Author: Dann Corbit

Date: 20:42:54 03/04/02

Go up one level in this thread


On March 04, 2002 at 17:43:29, Albert Silver wrote:

>The following position occurred in Spassky-Beliavsky, Reykjavik, 1988
>
>[D]2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
>
>Spassky found a tremendous move 25.Nxg6!! and won the game. I don't think any
>engines will have much luck with it but feel free to try it. I've analyzed it in
>detail and can verify that it is the strongest move and correct, so as a further
>challenge, see if you can find the *strongest* continuation after the possible
>defense: 25...hxg6 26.Qh6 Be6!?

Yace:

     23596   0.071   0.33  5t  1.Bc5 Bxc5 2.Qxc5 Qe7H 3.Rd6H Qxh4H 4.Qxc6H {0}
     40433   0.104   0.34  5t+ 1.Qg5 Bg4 2.Qxg4 Kh8 {350}
     41152   0.107   0.35  5t  1.Qg5 Qe7 2.Qh6 Bg4 3.Rd2 {0}
     60702   0.154   0.36  5t+ 1.c4 Bg4 2.Rd3 Kh8
     61153   0.156   0.36  5t  1.c4 Bg4 2.Rd3 Be7H 3.Qh6H {0}
     66628   0.170   0.36  5.  1.c4 Bg4 2.Rd3 Be7 3.Qh6 {0}
     91890   0.247   0.31  6t  1.c4 Bg4 2.Rd3 Be7 3.cxb5 Bxh4 {-260}
    102573   0.273   0.32  6t+ 1.Bc5 Bxc5 2.Qxc5 Qe7 3.Rd6 Nb4
    112425   0.297   0.45  6t  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.a3 {0}
    161661   0.404   0.45  6.  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.a3 {0}
    191583   0.469   0.42  7t  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.g3 Qg4 5.a3
                               {0}
    283485   0.728   0.43  7t+ 1.c4 Bg4 2.Nf3 Qe7 3.cxb5 axb5 4.Rd5 Bb4 {0}
    370627   0.947   0.45  7t  1.c4 Qe7 2.cxb5 axb5 3.Qh6 Be6 4.Bd5 Bxd5 {-350}
    606091   1.396   0.45  7.  1.c4 Qe7 2.cxb5 axb5 3.Qh6 Be6 4.Bd5 Bxd5 {-350}
   1032084   2.420   0.47  8t  1.c4 Qe7 2.cxb5 axb5 3.Qg3 Qf6 4.Bd5 Be7 5.Qd3H
                               {0}
   1957535   4.307   0.47  8.  1.c4 Qe7 2.cxb5 axb5 3.Qg3 Qf6 4.Bd5 Be7 5.Qd3
                               {0}
   3040439   7.115   0.45  9t  1.c4 Qe7 2.cxb5 axb5 3.Bd5 Nd4 4.Nf3 Nxf3+
                               5.Qxf3 Bb7 6.Qd3H {0}
   3440208   8.082   0.46  9t+ 1.Bc5 Bxc5 2.Qxc5 g5 3.Nf5 Bxf5 4.exf5 Qe7
                               5.Qxc6 Kh8 {350}
   4057178   9.662   0.52  9t  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.c4 Bg4
                               5.Rc1 bxc4 6.Bxc4H {0}
   6795357  15.323   0.52  9.  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.c4 Bg4
                               5.Rc1 bxc4 6.Bxc4 {0}
   8470520  19.168   0.54 10t  1.Bc5 Bxc5 2.Qxc5 Na5 3.Bd5 Bg4 4.f3 Be6 5.Qd6
                               Bxd5 6.exd5 {0}
  17261742  39.446   0.55 10t+ 1.Nf3 Bg4 2.c4 Qe7 3.cxb5 axb5H 4.Rd5H Bxf3H
                               5.Qxf3H Qb4H 6.Qe2H {HT} {10}
  17770517  40.816   0.55 10t  1.Nf3 Bg4 2.c4 Qb8H 3.c5H Bb2H 4.Rb1H Bd4H
                               5.h3H {HT}
  19194265  44.089   0.55 10.  1.Nf3 Bg4 2.c4 Qb8 3.c5 Bb2 4.Rb1 Bd4 5.h3
  26035008  1:01.8   0.47 11t  1.Nf3 Bg4 2.Bd5 Bd6 3.Bxf7+ Qxf7 4.Rxd6 Bxf3
                               5.gxf3 Nb8 6.Rd5 Nd7 7.Bc7 Kh8 {90}
  27292008  1:04.9   0.48 11t+ 1.Bc5 Bxc5 2.Qxc5 Na5 3.Bd5 Bg4 4.f3 Be6 5.Qd6
                               Qa8
  31968371  1:16.2   0.59 11t  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.c4 bxc4
                               5.Bxc4 Qf4 6.a3 Bg4 7.Rd6 {0}
  54567417  2:04.5   0.59 11.  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.c4 bxc4
                               5.Bxc4 Qf4 6.a3 Bg4 7.Rd6 {0}
  60146494  2:17.8   0.44 12t  1.Bc5 Bxc5 2.Qxc5 Qe7 3.Qxc6 Qxh4 4.c4 bxc4
                               5.Bxc4 a5 6.g3 Qg4 7.Rd3 Qh3 {0}
  66493325  2:34.6   0.45 12t+ 1.Nf3 Bg4 2.Bd5 Bd6 3.Bxf7+ Qxf7 4.Rxd6 Bxf3
                               5.gxf3 Nb8 6.Qg5 Qxf3 7.Qxe5 Rd8
  84864913  3:21.6   0.51 12t  1.Nf3 Bg4 2.Bd5 Qd7 3.c4 Bd6 4.c5 Bc7 5.Rd2 Bb8
                               6.Bc4 Qb7 {0}



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