Author: Vincent Diepeveen
Date: 17:04:21 09/21/03
Go up one level in this thread
On September 20, 2003 at 16:12:18, Dave Gomboc wrote: no way they could predict he would go caro-kann, so the statistical chance in a 4000 move book this line was there till nxe6 is like zero. however there are plenty of games played where amateurs made the h6? mistake and then got beaten up by nxe6, so trivially it was in the what i call 'random' book, which of course is an auto generated book out of many games. i remember how quickly on average i got out of book in several tournaments when i had 20000 move books. On average move 6 or so. But in side lines like this even quicker :) Just do 20 * 20 * 20 = 8000 moves already, so 8000 moves possibly is just a 3 ply book :) And after 2 moves there is more than 20 possibilities for white already :) Get the idea? If Nxe6 in this line was in the small 4000 move book, then the match was one big corrupt match. Because just fixing automatic books in the najdorf would be more than 4000 moves, so i bet majority of moves was for that opening. Some small tourbook + random 'gm' book behind it got beaten up badly a few years ago. Real bad. Especially Kure is good in killing them. Best regards, Vincent >On September 20, 2003 at 16:08:35, Dave Gomboc wrote: > >>On September 16, 2003 at 22:02:26, Vincent Diepeveen wrote: >> >>>On September 15, 2003 at 18:56:30, Mike Byrne wrote: >>> >>>>On September 15, 2003 at 09:11:25, emerson tan wrote: >>>> >>>>>I played a 24 game match between Shredder 6.02 and Hiarcs 7.32 with the >>>>>following opening. >>>>> >>>>>1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 h6 8.Nxe6 >>>>> >>>>>Time control was 40/4hrs + 20/2hrs + 2hrs to finish on a 1.8 Ghz processor. >>>>> >>>>>Shredder played all the white games and Hiracs all the black games. The score >>>>>went 13-11 in Hiarcs favor. Only a couple of games were drawn. >>>>> >>>>>I choose Shredder 6.02 to have white because it likes whites position and >>>>>without an opening book, it will play the 8.Nxe6 sacrifice. Also, Shredder has a >>>>>positional learning. I choose Hiarcs for black solely because of its positional >>>>>learning. Positional learning is important in this one opening match since it >>>>>will be able to learn and improve its next play based on the same opening. >>>>> >>>>>Maybe 8.Nxe6 is not a forced win for white. Maybe Kasparov can study it and use >>>>>it in some high profile match against computers since most of the programmers >>>>>might put it in their books thinking its a forced win for white. >>>> >>>> >>>>There is one hint that Joel Benjamin likes Nxe6 - since this move was not >>>>calculated but in DB's opening book. Although not certain, I suspect to leave >>> >>>No it was not put in the book by Joel Benjamin. >>> >>>They had a big random book and this definitely was played out of a random book. >>>No chance they could guess kasparov would play this line in caro-kann against >>>them. >>> >>>Benjamins book was just 4000 moves. See Hsu's publication in Artificial >>>Intelligence journal. >>> >>>With 4000 moves you can't even cover a few lines of the najdorf. >>> >>>Best regards, >>>Vincent >> >>My recollection is that 8. Nxe6 was the last move in the small book in this >>variation -- the next few moves afterward came from the extended book. The GMs >>doing the opening preparation left it in there because DB, thinking on its own, >>gave Nxe6 a plus score and preferred it to all alternatives anyway, and none of >>them thought Kasparov would actually go for the line so they didn't worry about >>it too much. >> >>Dave > >Agh, it's been too long, maybe even move 8 was in the extended book. I do know >that the GMs did look at this position briefly, saw what DB thought about it, >and moved on to the next variation fairly quickly. > >Dave
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.