Xu, Mousheng (SEA) writes: > * I've one powerful weapon in my arsenal after learning alpha-beta > search. Now what is Proof Number? Proof-number search is a best-first search algorithm. It may be useful in solving games (as was the case for Gomoku) and even as a search engine in an tournament program. The best source probably is http://www.cs.vu.nl/~victor/thesis.html -- Mika