Author: Stuart Cracraft
Date: 16:33:16 12/20/05
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On December 20, 2005 at 18:14:45, Dann Corbit wrote: >On December 20, 2005 at 17:03:13, Stuart Cracraft wrote: > >>On December 20, 2005 at 17:00:01, Alessandro Scotti wrote: >> >>>On December 20, 2005 at 16:30:11, Stuart Cracraft wrote: >>> >>>>So what is so special about Fruit 2.1's search? >>> >>>It works. ;-) >> >>Makes no sense - hundreds, even thousands of programmers have labored >>for 50+ years on computer chess, and along comes Fruit and Rybka? >> >>Some new special trick - I don't think just "well debugged code" is >>the point. > >It's the most important difference between his code and that of many others. It >is solid as a tank. His use of asserts is actually quite beautiful. It shows >his clear and clever thinking. My first-ever programming course was with Bob Floyd at Stanford who pioneered the point of provably-correct programs with the use of ASSERT and he emphasized it a lot. Do I place ASSERT's in my code? I do. I should do another run with them activated to see if anything has been introduced to hurt the program. I saw Fabien's ASSERT()'s but didn't think THAT much of them. It's an established paradigm. Programmers should use it. > >>Some new special search tricks. > >His branching factor is about 2, just like Shredder. That's obviously the most >important thing. Since he is smart enough to throw away the bad nodes and >consider the good ones better than other people, his eval and search are clearly >above average. Better than mine which is 2-3. > >>Now our collective job is to find it and absorb it into the >>collective Borg-style. >> >>It will be assimilated. Resistance is futile! >> >>Stuart > >It reminds me of the book: >"One Jump Ahead : Challenging Human Supremacy in Checkers" > >Because Fabian will take another step, when we catch up to where he is now. Yes - and unfortunately no source code then. One-time-gift. Still it was a good whack on the side of the head and a great kick in the seat of the pants for the community as a whole. I liked Jonathan's book. It's in my collection. Schaefer's result is non-trivial. Marion Tinsley was remarkable. Nothing like him in any other sport ever as far as I am aware. Too bad the crown had to pass due to a health issue. I guess Capablanca in chess and Shusaku in go come to mind as multi-year invincible champion-types. Stuart
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