Author: Inmann Werner
Date: 06:23:14 03/24/99
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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
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