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Subject: Re: Differences between 0x88 ,10x12 and Bitboards!?

Author: Robert Hyatt

Date: 13:07:08 11/19/02

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On November 19, 2002 at 14:56:27, Gian-Carlo Pascutto wrote:

>On November 19, 2002 at 14:53:45, Russell Reagan wrote:
>
>>On November 19, 2002 at 14:33:53, Gian-Carlo Pascutto wrote:
>>
>>>A factor 2? I don't know about you, but I think a factor 2 is _big_.
>>
>>Surely a factor of two in move generation is not that significant. Even if you
>>had an effective branching factor of 2 (which no one has consistently) you still
>>wouldn't gain even an extra ply.
>>
>>And a 2x speedup in move generation or make/unmake doesn't indicate that the
>>engine is any faster at all. It might do things elsewhere that someone else does
>>in make/unmake for example.
>>
>>A factor of 2 in move generation or make/unmake says that they're in the same
>>ballpark to me.
>
>Then what's the point in mentioning this as a proof that bitboards
>are not inferior on 32-bit hardware?
>
>--
>GCP


What "proof" would you like to see?

IE no one can offer something you accept as reasonable, so what do you _want_ to
see to verify that bitmaps are faster on 64 bit architectures relative to 32 bit
architectures??



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