Author: Dave Gomboc
Date: 14:04:31 03/24/99
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On March 24, 1999 at 09:23:14, Inmann Werner wrote: >On March 22, 1999 at 17:50:09, jonathan Baxter wrote: > > >> >>Its worth pointing out that I have not touched the code except in trivial ways >>for a long while (last major change was a few weeks ago where a "very nifty >>idea" for detecting trapped pieces cheaply was tried and discarded because it >>didn't work very well). So nearly all of the improvement in TDChess can be >>attributed to the book learning (it's not learning its evaluation function at >>present: that's constant). TDchess has no hand-coded openings---they are all >>learnt. >> >>Some may have already noticed that TDChess is wedded to some rather dubious >>looking variations of the center-counter defense as black (there are those who >>consider "dubious" too mild an adjective :). This is probably because it plays a >>lot against various versions of Crafty and Crafty can't seem to find really >>strong moves for white in these positions, so TDChess actually wins a lot of >>these games. However, over the last one or two days, TDChess has started to >>change its mind and currently prefers 1... e6 in response to 1. e4. Only took >>nearly 30,000 learning positions to be added to the brain for this to happen! >>I suspect a serious of standard games where it searched a lot deeper swayed the >>balance. >> >>However, the nice thing is that if TDChess does finally switch away for good >>from 1... d5 then it will know exactly why it is doing it. >> >>If you are interested, TDChess now lists the longest continuous brain variation >>in its finger notes, the total number of brain positions and the brain position >>it is currently "mulling" (researching). >> >> >>Cheers, >> >>Jon >> > >Hi Jon. > >Now I know what happens! Long time, TDChess was my nice partner for playing at >ICC. But game after game, I lost more, and now there is no chance to to anything >agains TDChess. I did not understand it, looked at my code etc.... (why to the >hack always!! loose) >You did a great job with your learning!!!!! Gratulation. >For me now, I know that I do not have to be disturbed. My program did not get >worse, but TDChess got much better by learning. > >Greetings and good luck > >Werner Is there an online copy of a paper describing TDChess' results? Dave Gomboc
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