Author: KarinsDad
Date: 12:04:36 09/20/99
Go up one level in this thread
On September 20, 1999 at 14:42:27, Robert Hyatt wrote:
[snip]
> +---+---+---+---+---+---+---+---+
> 8 | | | | | | | *K| |
> +---+---+---+---+---+---+---+---+
> 7 | *P| *P| | | | *P| *P| *P|
> +---+---+---+---+---+---+---+---+
> 6 | | | | | | | | |
> +---+---+---+---+---+---+---+---+
> 5 | | | | | | | | |
> +---+---+---+---+---+---+---+---+
> 4 | | | | | | *B| | |
> +---+---+---+---+---+---+---+---+
> 3 | | | | | | | N | |
> +---+---+---+---+---+---+---+---+
> 2 | P | P | P | | | P | P | K |
> +---+---+---+---+---+---+---+---+
> 1 | | | | | | | | |
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>This is the position prior to the last one. I (as black) played Bxg3. Old
>crafty promptly plays Kxg3 and now it has to watch out for the passed black
>pawn on the h file (eventually). new crafty plays fxg3 and black isn't going
>to make any passer.
>
Looks impressive Robert.
One question: How does this specific example work with rooks left on the board?
Having a position low in the graph of this example does not have a problem due
to the normal search preventing king threats and mate. However, if this pawn
evaluation is done 18 ply down, I could see a potential problem such as:
+---+---+---+---+---+---+---+---+
8 | | | | | | | *K| |
+---+---+---+---+---+---+---+---+
7 | *P| *P| | | R | *P| *P| |
+---+---+---+---+---+---+---+---+
6 | | | | | | | | *P|
+---+---+---+---+---+---+---+---+
5 | | | | *R| | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | *B| | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | N | |
+---+---+---+---+---+---+---+---+
2 | P | P | P | | R | P | P | K |
+---+---+---+---+---+---+---+---+
1 | | | | *R| | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Bxg3, fxg3 Rh5++
Do you have other code which forces you to check for king safety a few ply below
the pawn evalutation or do you just realize that event horizon is a problem
regardless and that if you are 18 ply down, there may be an alternative before
the actual position gets there anyway?
KarinsDad :)
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