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Subject: Bug in craftys movegenerator?

Author: Mikael Bäckman

Date: 03:56:10 07/10/03

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

Re: Bug in craftys movegenerator? Robert Hyatt 09:47:54 07/11/03
Re: Bug in craftys movegenerator? Ralph Stoesser 10:41:41 07/10/03
Re: This is in makeMove() and not the movegenerator itself. (NT) Mikael Bäckman 06:25:53 07/10/03
Re: Bug in craftys movegenerator? Michel Langeveld 05:26:08 07/10/03
- Re: Bug in craftys movegenerator? Uri Blass 05:50:38 07/10/03

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