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Subject: Re: Dynamic TB Access & Crafty..

Author: Bruce Moreland

Date: 18:39:21 10/16/98

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On October 16, 1998 at 15:33:45, Roland Pfister 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.
>>
>>
>>Why can crafty use "dynamic TB access" even at blitz speeds and on a slower
>>computer like PPRO 200, and it helps. But not MCP-7(8) even on a PII 400 and at
>>40/2 time controls. What is going wrong with MCP-7(8)& "dynamic TB access" that
>>is slowing it down so much that it hurts its performence even on P II 400?
>
>Obviously Marty is doing something wrong. I have no problem with
>dynamic TB access in my program, I do it similiar to Crafty.

I think it may very well be true that some endings would be played more weakly.
You start getting tons of hits on a queen and pawn ending and you can get
severely outsearched.  You end up losing the 7-piece ending rather than winning
or drawing the 5-piece ending.

I've seen node rates under a thousand nodes per second in some endings.

bruce



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