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Subject: Re: Christmas Test Position

Author: Dieter Buerssner

Date: 16:43:15 12/24/00

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On December 24, 2000 at 12:02:09, Uri Blass wrote:

>Here is a better hard test position from one of my games and I hope a correct
>one:
>
>5k2/3b1p1p/2p3p1/2P1P1P1/3N1K1P/8/8/8 w - - 0 1
>
>This position is from my game against another player.
>
>I played 49.e6 that is probably winning.
[...]
>The question is if chess programs can find 49.e6 that seems to be the best move.

Yace switches to e6 after 67 seconds.

  nodes   seconds score depth
  15519954 66.94   0.35 16t+: 1.e6 fxe6 2.Ke5 Ke7 3.Ne2 Be8 4.Ng3 Bd7 5.Ne4
                              Bc8 6.Nf6 Bb7 7.Nxh7 Kd8
  17946388 77.34   0.41 16t : 1.e6 fxe6 2.Ke5 Ke7 3.Nf3 Bc8 4.Nh2 Kf8 5.Ng4
                              Kg7 6.Kd6 Bb7 7.Ne5 h6 8.Nxc6 Bxc6 9.Kxc6 hxg5
                              10.hxg5 {0}

and keeps it for at least 6 1/2 minutes, without improving the score too much.

  80840083 389.8   0.47 19. : 1.e6 fxe6 2.Ke5 Ke7 3.Nf3 Bc8 4.Nh2 Kf7 5.Ng4
                              Ke7 6.Nf6 Ba6 7.Nxh7 Be2 8.Nf6 Bf3 9.Kd4 Be2
                              10.Ke4 {-10}

All 4-men tables + KPPKP. AMD K6-2 475.

Regards,
Dieter




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