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Subject: Re: Dynamic TB Access & MChess

Author: Kai Lübke

Date: 04:49:52 10/17/98

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On October 16, 1998 at 15:52:56, Ernst A. Heinz wrote:

>On October 16, 1998 at 11:41:21, Mark Young wrote:
>>
>>** MChess played its games so far with "dynamic TB access" activated which is
>>discouraged by Marty. It's likely it would have played better without it.
>
>Isn't it only discouraged if you use the TBs from CD?
>
>Should be not worse than for any other program that probes TBs at interior
>nodes if you copy the Tbs to your harddisk.

I had them on HD. However, the problem seems to be that MChess slows down a lot
during heavy TB access (8 Knps or less on P6-233, about 14 Knps on PII-400)
which seems to outweigh the positive information from the TB's.
Crafty is not affected this much since it's 3-4 times faster than MChess.

>Maybe it is worse for MChess because it extends much more aggressively, thus
>going deeper in selected lines than others and hitting on the TBs more often.

Exactly. Crafty hardly ever goes below 1/2 its usual speed, MChess often goes to
1/10.

---
Shep



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