Author: Robert Hyatt
Date: 20:34:57 04/29/04
Go up one level in this thread
On April 29, 2004 at 23:26:12, Dave Gomboc wrote: >>>>No of course not, brute force is silly, Rebel since day 1 has been a selective >>>>program. But I am getting your point, in the days before the nullmove was >>>>discovered Genius and Rebel had the best (static) selective search, a dominant >>>>factor in their successes, is that what you meant to say? If so, it is true. >>>> >>>>If only Frans had kept his mouth shut to Chrilly (Chrilly leaking nullmove in >>>>the ICCA journal) it is very likely Fritz would been the next Richard Lang still >>>>dominating all the rating lists and WCC's for the last decade. But Frans didn't >>>>and then all bets were off. >> >>>Donninger published the article in 1993. Before that, there were two other >>>publications dealing with null-move: >> >>Yes, nullmove as we use it today, the other 2 articles not. >> >>Ed >> >>>Beal, D.F. (1989). Experiments with the null move. Advances in Computer Chess >>>5, (Ed. D.F. Beal) , pp. 65--79. >>> >>>Goetsch, G. and Campbell, M.S. (1990). Experiments with the null-move heuristic. >>>Computers, Chess, and Cognition, (Eds. T.A. Marsland and J. Schaeffer), pp. >>>159--168. > >I think that while Chrilly Donninger's article was important, if it had not been >published the idea would have been discovered and published later anyway. The >question is how much longer would it have taken to become public knowledge? Of >course, we can never know, but given that people were doing experiments with the >null move already I don't think it would have taken a whole decade. > >Dave I was doing null-move in 1989-1990 after receiving a draft of Campbell's paper from Burton Wendroff (lachex). I used R=1, although Campbell's paper specifically mentioned R=2 as a test that needed to be done. Chrilly's paper was more about the null-move threat detection, if I recall the paper, as that part was a new idea (doing a null-move and seeing if it failed low badly but a real move failed high normally, suggesting that this is a position where there is a forced move to hold off a serious threat, something that needs to be searched deeper). I believe I still have the hardcopy of the draft of the paper I received. I don't have dates, but based on version numbers in my old CB hard copy, it appears that null-move was added prior to the 1989 wccc event after I saw this paper. I also have a draft from that same time period of the first singular extensio paper they wrote... I didn't implement that for several more years however...
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