Author: Peter McKenzie
Date: 01:08:13 10/29/99
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On October 29, 1999 at 03:08:55, David Blackman wrote: >On October 29, 1999 at 02:34:23, Ed Schröder wrote: > >>Your argument is in contradiction also. The MAIN improvement for nowadays >>programs since 4-5 years comes from NULL-MOVE, right? This includes Crafty >>as well. > >Bob was using null move in Cray Blitz a bit more than 5 years ago i think. > >> >>And who gave you null-move? >> >>Right, 2 commercial chess programmers :-) >> > >Commercial chess programmers did not invent null move. As far as i know the >modern form of null move was invented by the Russian Caissa team (Donskoy, >Alazarov, Adelson-Velskiy etc) in the early 1970s. These guys were not >commercial. > >By the late 1970s several British programmers had heard about it and it was >probably Don Beal (who is not commercial as far as i know) who made it well >known, sometime in the 1980s. While it is true that the concept of the null move was around for a long time, it took even longer for people to figure out what it was good for :-) I think Doninger was the first to publish about null move pruning. Previously, null move had been mainly associated with threat detection and quiescence search as far as I'm aware.
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