Author: Amir Ban
Date: 14:10:10 03/14/98
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On March 14, 1998 at 15:34:19, Sylvain Renard wrote: > During the World Micro Computer Chess Championship in Paris, >Amir Ban told us that his program didn't use the null move technique. >So I was rather surprised that Junior 4.6 could not find the winning >move in this position: White Kh3, Ne7, pawns g3,h4; Black Kf3, >Ne5, pawns g6,h5; black to move. 1...Ng4! > This test was first used for computers in 1982 (!) by M. Pierre Nolot >(Europe Echecs n°286 Octobre 1982). > Fritz 2, 3 and 4 are also unable to find the solution because there >are using the null move technique and there is a zugzwang in the main >line. >But Frans Morsch worked well and Fritz 5 now plays the good move. > Can Amir Ban explain to us what is going wrong with Junior and this >test? Thank you! Junior has been "told" that a win with a lonely knight is impossible. There are some odd positions where this is not true, and this is one of them. Amir
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