Author: John Coffey
Date: 15:40:01 09/20/98
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I found this on http://www.xs4all.nl/~mdgsoft/draughts/computerplay.html ..... ">1) null move. A null move is doing nothing, even if the rules don't allow this. Why? In some games you can make the assumption that the player to move can always improve their situation. So, by testing a null move, you can see if there's bound to be a cutoff. IE 'this position is already too good, once they've made a move here, it's going to get even better, so I don't need to spend time generating and testing real moves...' Chess is an example of a game where this assumption nearly always holds. In fact there's a word for those times when it doesn't: zugzwang, the German for oh *!$#, I have to make a move here :)" ----------------------------------------------------------------------------- I gather from this that if a move appears to win material that it is not going to be searched deeper? Could be dangerous as Robert said. John Coffey
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