Author: Uri Blass
Date: 06:41:51 08/02/02
Go up one level in this thread
On August 02, 2002 at 07:54:53, Slater Wold wrote: >On August 02, 2002 at 07:50:31, pavel wrote: > >>On August 02, 2002 at 05:47:52, K. Burcham wrote: >> >>> >>> >>>Rxc4 >>> >>>In any case, it was a breathtaking move and I still marvel at it more than any >>>other move I have seen a chess program play. >>>Dan Corbit >>> >>>Dan do we know the Rxc4 line in Junior eval? >>>I could not get Deep Junior7 to play this move. 2x1533mhz, 12 hours. >>>Why are you so fascinated by this move when we have not proven this >>>move is a good sacrifice? have you seen eval change in favour of black with >>>another program? i have not seen this. >>>kburcham >> >>It was a differant program than Junior7. >>According to Amir, Junior8 will most likely be released at the end of this year >>(during Fall), and it will be aprox. 50 elo points better than it's previous >>version. >> >> >>So it's probably is not a good idea to see if Junior7 finds Junior8's move. >> >>By the way, can anyone be kind enough to provide the position (again) in this >>thread, I wanna give it another shot by other programs, to see if there was a >>better move. >> >>To K.burcham: do you suggest/know any other better/best move than Rxc4? >> >>cheers, >>pavs > >[D]r1r5/3nbpk1/4qnp1/4p1Bp/1pN1P3/1PP2Q2/4N1PP/3R1R1K b - - > >I have followed 2 lines down to a win for Junior. Rd5 and h3. > >In about 10 hours of "evaluating", I would say Rxc4 is the best move. > >It is just incredibly deep. Can you prove that Rxc4 is best by yace and a tree? Yace is the only program that I know that has a good learning function during analysis. if you start by analyzing the leaves of the tree and go backwards yace can agree that a move is best inspite of not finding it when it gets only the root position. There are other programs that can learn during analysis but usually their learning is inferior and if the tree has more than one line and I start by going backwards in line A and continue by going backward in line B they may forget line A because they use the rule:first forget what you learned first(it is impossible for programs to remember everything in analysis because the tree is large and programs must forget part of the information). Yace knows that score,main line and depth is something that it should never forget in analysis and it can use the information to have better analysis of the root position. Uri
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