Author: Dieter Buerssner
Date: 07:29:40 12/24/00
Go up one level in this thread
On December 24, 2000 at 08:02:18, David Rasmussen wrote:
>Actually, it has nothing to do with christmas, but here goes:
>
>8/8/5n1p/p1k1pBpP/1p2P1P1/1P2K3/P7/8 b - - 0 1
>
...
>The line played was 1...Kb5 2. Kd3 a4 3. bxa4+ Kxa4 4. Kc4 Ka3 5. Kc5 Kxa2 6.
>Kxb4 Kb2
>
>My problem is that Chezzz doesn't find this line.
Neither does Yace.
Now Chezzz is no genius,
>especially not in endgame situations, but when I run a search from the resulting
>position, it gives black a +0.60 advantage, so it should be able to see this.
After the end of the line I get in under a minute a score of over 2.5
in favor of black.
>Never the less, from the starting position, after searching 15 plies deep, it
>still evaluates the position as 0.01 with a boring line of just moving the
>pieces around.
In the position given, I get a score of 0.25 in favor of black, mainly
becuase of the color of pawns and the bishop.
>How do other programs do in this position? It doesn't seem very difficult.
Perhaps this line cannot be found by a chess engine. Mine wants to move
4. Ke3, and shows again a score of about -0.2. If I force Kc4, I get almost
immediately a score of about one in fovor of black. The line for whites 4th move
shows now captures and pawn pushes, even after a pretty long search:
247081875 1214.6 -0.19 23t 4.Ke3 Ka3 5.Be6 Kb2 6.Kd3 Kb1 7.Ke3 Kc2 8.Bf5
Ne8 9.Be6 Kb2 10.Bc4 Nf6 11.Be6 Kc3 12.Kf3 Kd4
13.Bf5 Ng8 14.Be6 Ne7 15.Bf5 {10}
Happy Christmas to everybody,
Dieter Bürßner
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