Author: Uri Blass
Date: 00:48:09 02/01/01
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On February 01, 2001 at 02:20:33, Sandro Necchi wrote: <snipped> >No, maybe I did not clearly explain what I meant. I said that a friend of mine, >testing the program regardless of the opening book, said that it was 100 points >better than Fritz 6a. So it was not the book making it stronger, but the engine >being stronger. My impression about the engine is different. I used ahredder5 for a long time to analyze positions from my correspondence games when I was in theory. If the engine is 100 elo better than I expect it to find good moves in the opening without opwning book. I found that shredder suggested me a stupid sacrifice and only after many hours the score went down and it converge to the theory move Re1. Here is the opening in my correspondence game against yoav dothan(I am white) 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 b5 7.0-0 Bb7 I gave Shredder5 to analyze this position for a long time and it needed many hours to avoid the bad sacrifice 8.e5 It changed it's mind to Re1 that is the theory move only after many hours. I analyzed 8.Re1 when there is an interesting line 8.Re1 b4 9.Nd5. I can also sacrifice a pawn by 9.Na4 I did not get a clear consequence about the sacrifices and I decided after a long think to play 8.a3 and not to sacrifice a pawn or a knight(the game continued 8...Nf6 9.Qd3 d6 10.Bg5 and it is yoav to move). One of the reason that I decided not to sacrifice is the fact that my opponent does not have to accept and I assume in my correspondence games that my opponent will probably play the best move. It means that if I evaluate that b4 has 50% chance to win and 50% chance to lose my chances are smaller than 50% because I assume that my opponent will play b4 with probability of more than 50% if it wins and will not play it with probability of more than 50% if it loses. Uri
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