Author: Michel Langeveld
Date: 05:26:08 07/10/03
Go up one level in this thread
On July 10, 2003 at 06:56:10, Mikael Bäckman wrote:
>Hi,
>
>I've been tracking down problems with my engine, and found some oddities in
>updatíng the hashsignature after each move. Anyways, I thought "I wonder how
>crafty does it" and well, I think crafty does it wrong.
>
>Code from Crafty 19.3:
>
> case king:
> if (wtm) {
> [snip]
>-> if (WhiteCastle(ply) > 0) { <-
> if (WhiteCastle(ply+1)&2) HashCastleW(1,HashKey);
> if (WhiteCastle(ply+1)&1) HashCastleW(0,HashKey);
> [snip]
> }
> }
> else {
> [snip]
>-> if (BlackCastle(ply+1) > 0) { <- not the same ply as above?
> if (BlackCastle(ply+1)&2) HashCastleB(1,HashKey);
> if (BlackCastle(ply+1)&1) HashCastleB(0,HashKey);
> [snip]
> }
> }
> break;
>
>Since crafty knows how to castle the code obviously works, but it doesn't look
>right..
>
>Regards,
>Mikael
Since blackcastling rights only change by black moves ...
I think can be that it goes right in both ways. I agree that it would be neat to
use one approach
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