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Subject: Bitboards, pre-computing moves, and blocked squares?

Author: Andrew N. Hunt

Date: 09:51:38 11/30/04

Hi!

I've recently implemented bitboards (standard and rotated) and have a question
about pre-computing moves which contain blocked squares. Let's say I have the
occupied rank:

bQ, wN, _, wR, _, bP, bN, _

and I want to find the valid moves for the white Rook. How do I handle modifying
its bitboard rank: 11010110 to remove the blocked squares and only store the
available squares: 01101100? (which I can then And with the white/black pieces
to find valid Rook moves)

Maybe I'm missing something obvious... :-?

Many thanks!





ah.

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Andy Hunt
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Wolfram Research, Inc.
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Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 13:33:20 11/30/04
- Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 01:36:11 12/02/04
  - Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 03:20:14 12/02/04
    - Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 08:05:31 12/02/04
      - Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 09:51:28 12/02/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 11:20:40 12/02/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 14:39:01 12/02/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 04:22:10 12/03/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 09:16:02 12/03/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 12:13:51 12/03/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Gerd Isenberg 13:42:53 12/03/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 03:44:19 12/04/04
Re: Bitboards, pre-computing moves, and blocked squares? Robert Hyatt 12:07:29 11/30/04
Re: Bitboards, pre-computing moves, and blocked squares? Steffan Westcott 11:49:05 11/30/04
Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 10:25:08 11/30/04
- Re: Bitboards, pre-computing moves, and blocked squares? Dann Corbit 10:42:39 11/30/04
  - Re: Bitboards, pre-computing moves, and blocked squares? Dan Honeycutt 11:59:04 11/30/04
    - Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 12:44:47 11/30/04
      - Re: Bitboards, pre-computing moves, and blocked squares? Tony Werten 22:20:17 11/30/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 05:19:55 12/01/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Anthony Cozzie 10:35:56 12/01/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 11:05:22 12/01/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Dan Honeycutt 12:03:01 12/01/04
        
        Re: Bitboards, pre-computing moves, and blocked squares? Vasik Rajlich 01:39:19 12/02/04
      - Re: Bitboards, pre-computing moves, and blocked squares? Dan Honeycutt 12:58:35 11/30/04
  - Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 11:23:15 11/30/04
- Re: Bitboards, pre-computing moves, and blocked squares? James Swafford 10:28:40 11/30/04

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