Author: chandler yergin
Date: 20:37:41 10/10/05
http://chess.verhelst.org/1997/03/10/search/ "Tree search is one of the central algorithms of any game playing program. The term is based on looking at all possible game positions as a tree, with the legal game moves forming the branches of this tree. The leaves of the tree are all final positions, where the outcome of the game is known. The problem for most interesting games is that the size of this tree is tremendously huge, something like W^D, where W is the average number of moves per position and D is the depth of the tree, Searching the whole tree is impossible, mainly due to lack of time, even on the fastest computers. All practical search algorithms are approximations of doing such a full tree search."
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