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Subject: Re: Thoughts about board representations...

Author: Tom Kerrigan

Date: 23:58:42 02/12/00

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On February 13, 2000 at 00:55:03, Andrew Dados wrote:

>On February 12, 2000 at 22:37:50, Robert Hyatt wrote:
>
>>On February 11, 2000 at 18:10:57, Tom Kerrigan wrote:
>>
>>>On February 11, 2000 at 14:04:16, Andrew Dados wrote:
>>>
>>>>>As for holes in the piece list, I figured you could fill them up:
>>>>That way your piecelist will not be preserved during search... while it does not
>>>>have to, it introduces changes into, say, order of generated moves. I am not
>>>>sure if I want that.
>>>
>>>I don't see why that's a big deal. The searches are still deterministic.
>>>
>>>-Tom
>>
>>
>>It isn't really deterministic if you do hashing. Try fine 70 and fiddle with
>>your move ordering to see this.
>>
>>But the main thing is that you _must_ be able to produce identical node counts
>>during testing...
>
>Also for LVA/MVV thing you need your piecelist sorted...so why scramble it?

No, you just need to know what kind of piece the victim/attacker is.

The reason for "scrambling" the piece list is obvious... so you don't have to
check every entry to see if it's "dead"...

-Tom



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