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Subject: Re: Testposition - Good bishop vs Limited knight

Author: Dieter Buerssner

Date: 10:04:02 03/02/01

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On March 02, 2001 at 08:37:53, Sune Larsson wrote:

>  8/1p5k/4pP2/6B1/8/1P6/8/1n4K1 w - - 0 1
>
>  Dawson 1925
>
>  Seemingly about equal but your evals should soon show a big + for white.
>  In fact white is winning this position by showing the limitations
>  of a poor placed knight.
>
>  Test: White moves and wins. The sooner your program sees it - the better.
>        It might happen in a tournament game!

Yace:

    859525   4.237  -0.40 13-- 1.Kf2 Kg6 2.Ke3 Nc3 3.Kd4 Nd5 4.b4 Nxb4 5.Bf4
   1188635   5.642  -0.73 13t  1.Kf2 Kg6 2.Ke3 Nc3 3.Kd4 Nd5 4.Bh4 Kf7 5.Ke5
                               Ne3 6.Bg5 Ng4+ 7.Kd6 Nxf6 {-70}
   1603758   7.249  -0.73 13.  1.Kf2 Kg6 2.Ke3 Nc3 3.Kd4 Nd5 4.Bh4 Kf7 5.Ke5
                               Ne3 6.Bg5 Ng4+ 7.Kd6 Nxf6 {-70}
   2210604   9.834  -0.72 14t  1.Kf2 Kg6 2.Ke3 Nc3 3.Bh4 Nd5+ 4.Kd4 Kf7 5.Ke5
                               Ne3 6.Bg5 Ng4+ 7.Kd6 Nxf6 8.Be3 {HT} {-70}
   2792386  12.246  -0.72 14.  1.Kf2 Kg6 2.Ke3 Nc3 3.Bh4 Nd5+ 4.Kd4 Kf7 5.Ke5
                               Ne3 6.Bg5 Ng4+ 7.Kd6 Nxf6 8.Be3 {-70}
   3938955  17.093  -0.76 15t  1.Kf2 Kg6 2.Ke3 Nc3 3.Bh4 Nd5+ 4.Kd4 Kf7 5.Ke5
                               Ne3 6.Bg5 Ng4+ 7.Kd6 Nxf6 8.Ke5 Nd5 {-70}
   5028501  21.384  -0.75 15t+ 1.f7 Kg7 2.Be7 Kxf7 3.Bb4 b5 4.Kf2 Kg6 5.Ke3
                               Kf5H {HT}
   5137781  21.801  -0.70 15t  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Kf6 4.Kf2 Ke5 5.Ke3
                               Kd5 6.Kd3 Kc6 7.Be7 b5 8.Kd4 {-70}
   5702375  24.188  -0.70 15.  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Kf6 4.Kf2 Ke5 5.Ke3
                               Kd5 6.Kd3 Kc6 7.Be7 b5 8.Kd4 {-70}
   6157589  25.869  -0.30 16++ 1.f7 Nd2
  36008329  2:08.2   0.00 16t  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Ke8 4.Kf2 Kd7 5.Ke3
                               Kc6 6.Kd3 Kb5 7.Be7 Kc6 8.Bb4 {-70}
  39194512  2:21.9   0.00 16.  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Ke8 4.Kf2 Kd7 5.Ke3
                               Kc6 6.Kd3 Kb5 7.Be7 Kc6 8.Bb4 {-70}
  39893341  2:24.7   0.40 17++ 1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Ke8 4.Kf2 e5 5.Ke3 e4
                               6.Kxe4 Kd7 7.Ke5 b5 8.Be1 b4
  40000628  2:25.1   0.40 17t  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Ke8 4.Kf2 e5 5.Ke3 e4
                               6.Kxe4 Kd7 7.Ke5 b5 8.Be1 Ke7 9.Bf2 {10}
  44576394  2:44.9   0.40 17.  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 Ke8 4.Kf2 e5 5.Ke3 e4
                               6.Kxe4 Kd7 7.Ke5 b5 8.Be1 Ke7 9.Bf2 {10}
  45769556  2:49.6   0.80 18++ 1.f7 Kg7 2.Be7 Na3
  47138072  2:54.4   1.74 18t  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 e5 4.Kf2 b5 5.Ke3 Ke6
                               6.Kd3 Kd5 7.Kc2 e4 8.Kxb1 e3 9.Kc1 e2 10.Kd2
                               {270}
  55020441  3:27.3   1.74 18.  1.f7 Kg7 2.Be7 Kxf7 3.Bb4 e5 4.Kf2 b5 5.Ke3 Ke6
                               6.Kd3 Kd5 7.Kc2 e4 8.Kxb1 e3 9.Kc1 e2 10.Kd2
                               {270}
Dieter



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