Author: Dan Andersson
Date: 10:53:39 04/24/01
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I would think he only uses PN search, PN search works best when there is limited mobility after a move, or there is a heuristic evaluation with high reliability. 'Forced' is such a slippery concept many mating nets are forced checks, but PN search will have problems with the quiet move like the rook lift, limiting moves and somesuch unless one has a heuristic of very good accuracy to recommend the move. There is some other improvements that can be made to shrink the tree even further. Regards Dan Andersson
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