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Subject: Re: Good news !

Author: Frank Quisinsky

Date: 21:56:57 01/12/01

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On January 12, 2001 at 22:46:33, Bas Hamstra wrote:

>Within a few days I will put a new version of Tao 5.5 on Frank's web site. There
>have been several small improvements, resulting in an ELO improvement of exactly
>50.00 points. The main difference is that it uses evaluation learning based on
>Temporal Difference. With all parameters set to zero it quickly learns how to
>improve the most important eval terms, and play better chess. In my opinion
>however, it is not able to set all terms to optimal values within a reasonable
>amount of time. Judge it yourself, you can let it learn from zero, or you can
>turn learning of and tweak the weights manually. So far, it seems best to start
>with a good guess and hand-tweak the few terms it does not seem to learn (or
>learns too slow). Having learning turned on has no performance penalty.
>
>The main differences with the previous version are:
>
>- Temporal Difference learning (can be scaled from 1000 to zero = off)
>- More accurate repetion detection
>- Better tactics (290 WAC within 5 sec)
>- Eval changes to let it play more interestingly and actively
>- Eval parameters user settable
>- More accurate PV's (less half PV's that end in the hash table)
>- Improved search efficiency
>- Some changes and additions to the evaluation
>
>I have not hand tuned the eval weights for a long time, like in the previous
>version. Therefore the eval is sometimes over-optimistic and maybe not totally
>balanced. But still, IMO, it plays very interesting attacking active REAL chess.
>I have not had time to test it at very long time controls.
>
>Have fun!
>Bas.

Hi Bas,

good news !
I must make a lot of detail pages. At the moment I work on little reviews for
Gambit-Soft and so I make the detail pages later.

Ponder On / Off options is important. I hope you you have the time to make here
a little parameter !

Best
Frank



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