Author: Robert Hyatt
Date: 11:06:39 12/02/98
Go up one level in this thread
On December 02, 1998 at 01:45:10, Christophe Theron wrote: >On December 01, 1998 at 20:36:09, Kim Hvarre wrote: > >>Hello Ed, >> >>Exiting project You and Chistophe have going with The Tiger. In this relation >>just one question, quoting Your homepage: >> >>"One of CHESS-TIGER's search algorithms has been implemented in REBEL and is >>further improved by Ed Schröder. The CHESS-TIGER idea plus Ed's own improvements >>have speed up REBEL with a factor of 2-3. The first results are very promising. >>At the playing level of 1:00 per move REBEL scores 47½-31½ against various >>strong computer opponents. >> >>For the moment the conclusion is Christophe's idea has given REBEL an elo jump >>of at least 30 elo points but more likely the gain in playing strength is 50 elo >>points or even more. The basic idea is im-plemented in the third party engines >>of:" >> >>The question: The large jump in speed is this on behalf of something else >>(knowledge, whatever) or is it just a "simple trick"/algoritme/?, You and >>perhaps others have overseen? >>If so, it's a rather amusing and a nice perspective in respect to the promising >>future of search. >> >>Regards, >> >>kim > >Maybe Ed will answer too, but I can give you some info. > >As Ed and I have suspected right from the begining of the project, Rebel and >Tiger are very very different programs. > >It appears that we use different algorithms to achieve a relatively close level >of play. > >Some of these algorithms are incompatible with each other by nature. Maybe we >will be able to get something by exchanging them, but it is not sure. > >But there are other algorithms that are compatible in both programs. And this is >very interesting. Ed has found ideas that I have not found, and the opposite is >true also. In the case Ed describes, one of Tiger's selection algorithms that >did not exist in Rebel has been successfully implemented in Rebel. > >This algorithm is not really a programmer's trick. It is an idea taking >advantage of the nature of the chess game. I cannot say more, but I would rather >describe this as being knowledge, because it would certainly not work with other >games. > >And what is more exciting is that Ed -probably angry that he did not find the >idea himself- decided to improve it further. :) > >And he succeeded! This time I can learn from the changes he has done to my own >algorithm and improve Tiger in return! > >I expect this to happen again several times, with different things. We have just >begun exchanging ideas, and there is already a concrete result! > > > Christophe Sadly, this is what was so much fun in the 70's and early-to-middle 80's... this happened all the time because everyone shared ideas. Too bad it ended with the "commercial secrecy" act... :(
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