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Subject: Re: Quick bit extraction question

Author: Tord Romstad

Date: 09:09:54 07/21/04

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On July 21, 2004 at 11:41:42, Daniel Shawul wrote:

> Hi Tord
>   what's hexagonla chess?

Chess played on a hexagonal board rather than a square-shaped board.  For an
explanation of the rules, have a look at the following URL:

http://www.chessvariants.com/hexagonal.dir/hexagonal.html

> Is it much different from normal chess.

The main difference is the shape of the board.  Most of the rules are
exactly the same, except that a stalemate is not a draw in hexagonal
chess.  When a game ends in stalemate, the "winner" gets 3/4 of a point
and the "loser" 1/4 of a point.  An interesting problem from an engine
developers point of view is which score should be used to represent
stalemate.  At the moment, I use stalemate=0.04 pawns.

I personally like the game better than chess, because of the bigger
tactical complexities and the deeper and more challenging endgame.  It
is also a slightly more tricky game to program because of the bigger
branching factor.  My experience so far is that the search tree tends
to explode very easily.

>   I had an engine which played chess and checkers [same code] and
>   it was very hard for me to update both at the same time. It was only
>   after i saw tscp i stick to chess only.

So far, my code is 99% equal in both programs.  There are just a few tiny
differences in the move generators, evaluation functions and IO routines.
Both programs have reached the stage where they are able to play a game
and solve simple tactical problems, but they are still very weak.

I expect to release the first public versions in August.

Tord




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