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Subject: Re: Nimzo Paderborn (German)

Author: Ernst A. Heinz

Date: 03:14:17 07/09/99

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On July 08, 1999 at 13:14:55, Christian Goralski wrote:

> Nimzo-Paderborn
>
>Verbesserungen gegenueber Nimzo99
>
> [...]
>
>b) Eigene komprimierte Endspiel-Datenbank, auf die auch in der Ruhesuche
>zugegriffen wird. Dadurch werden Abtaeusche in gewonnene Endspiele sehr
>schnell gefunden bzw. Abtaeusche in verlorene vermieden

Just for the record and information of interested chess programmers:

The new endgame databases of "Nimzo-Paderborn" are based on the
knowledgeable encoding technique as introduced by "DarkThought" and
decribed in my article "Knowledgeable Encoding and Querying of Endgame
Databases" in the ICCA Journal 22(2), pp. 81-97.

Chrilly Donninger further advanced my published scheme in "Nimzo".

>c) Zusaetzlich (zum Nullmove) neue selektive Suchtechnik (Details sind aber
>Top-Secret).

In Paderborn, Chrilly openly admitted to employ multi-cut pruning.
Maybe this is the "top secret" method ...

The bibliographic refernces for multi-cut pruning follow below.

Bj"ornsson, Y. and Marsland, T.A. (1999).
Multi-cut pruning in alpha-beta search.
1st International Conference on Computers and Games,
Proceedings, H.J. van den Herik and H. Iida (eds.),
pp. 15--24, LNCS 1558, Springer, ISBN 3-540-65766-5.

Bj"ornsson, Y. and Marsland, T.A. (1998).
Risk management in game-tree pruning.
Technical Report TR 98-07, Department of Computing Science,
University of Alberta.

=Ernst=





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