Author: Vincent Diepeveen
Date: 17:23:36 02/01/00
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On February 01, 2000 at 13:40:59, Eugene Nalimov wrote: >In his lecture at MS Murray Campbell said several words about Nxe6. It was added >to DB opening book by GM Benjamin after he found that DB understands position >after that move. Unfortunately, I don't remember exact words - either "DB liked >the position after Nxe6", or "DB would like to play Nxe6 even by itself". Nah back in 1997 already there were basically only wins with Nxe6 lines, except a fritz3 game i think or something, so it was considered bad and all automatic generated books have Nxe6 as only playable move there. That's still the case... ...knowing deep blue always used a big automatic generated book (info from Bob this is at least) i doubt whether they needed Benjamin for that. Deep Blue would not have played Nxe6. Score before is positive for white above 0.20, after Nxe6 it is under -0.20 for white. First 13 plies to my surprise diep doesn't play Nxe6 either, though score is just within hundreds of not playing it i saw some sooner this day. > >Eugene > >On February 01, 2000 at 08:48:31, Vincent Diepeveen wrote: > >>Hello, >> >>For years i've been wondering why Kasparov played h6?? in the last >>game against deep blue. It is for sure that Kasparov knew that h6?? was >>a bad line after Nxe6! >> >>Kasparov has said several things about this game, all crap what he says >>in my eyes. Latest explanation of him i heart being said on the internet >>was that Kasparov with his excellent memory and as a professional and >>young player had forgotten it and hastely played h6 thinking it would be >>transposition anyway. >> >>Now i found that already very unlikely. See here my big surprises when >>checkingout the log files of Deep Blue. >> >>I figured out that Deep Blue had thought already about moves before this! >>Even though some moves were from book, the moves Nxe4 and Bd3 especially >>there deep blue lost like 6 minutes of time somehow. Kasparov must have >>thought deep blue was out of book! >> >>Some moves that were made quickly by deep blue Kasparov must have thought >>there that they were predicted correctly by the computer, which was in fact >>true. the move e6 was in fact predicted correctly. >> >>Now first we can clearly deny that kasparov hastely played h6 by accident. >>The log file shows clearly that kasparov has thought nearly 93 seconds about >>making h6. >> >>Now for the average player 93 seconds in opening might mean he just drank >>a bit of his tea, but Kasparov who plays theorem always within a second, >>has given this position over a minute of thought. >> >>That can mean only one thing! >> >>Kasparov OBVIOUSLY knew both lines. He KNEW h6 was bad. He KNEW Bd6 was good. >> >>He MIGHT have considered deep blue out of book. It is very unlikely that >>deep blue would have played Nxe6. The score is -0.20 after the sacrafice >>and before that it is about +0.20, so over 0.40 pawn difference between Nxe6. >> >>Of course Nxe6 was in book. Log file clearly show that. >> >>Kasparov made Qe7 directly. Within 20 seconds. If Kasparov had forgotten >>the Nxe6 line he would have been in shock for at least quite some time. >> >>Kasparov was not. So kasparov WILLINGLY risked the Nxe6 line. He very likely >>must have thought in that 1 and a half minute before deciding to move h6 >>about that he already had a chance that deep blue would NOT capture at e6, >>after which black is fine. If deep blue WOULD capture, nah then kasparov was >>a piece up, like in previous games deep blue might simply allow queen exchange >>after which kasparov was a piece up and would win chanceless. >> >>Let's not call Kasparov too many words, but he sure was arrogant underestimating >>the computer in an open position. He sure was ignorant about the aggressive >>tuning of deep blue and he sure was naive risking Nxe6 and not even blinking >>when the program played it. >> >>Vincent
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