Author: Drexel,Michael
Date: 12:37:52 06/25/05
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On June 25, 2005 at 14:47:32, Robin Smith wrote: >In a previous thread some people have been repeatedly stating that choosing >1...e5 as a human’s defense against 1.e5 is a very poor choice. They said >practice has repeatedly shown this. I posted some games to the contrary and was >accused of "cherry picking" (which was true enough). So I decided to go back and >look at all the recent man-machine matches between strong humans and strong >computers. The results were a surprise, even for me. The matches I looked at >were: > >Deep Blue-Kasparov 1996, Deep Blue-Kasparov 1997, Deep Fritz-Kramnik 2002, >Rebel-van Wely 2002, X3D Fritz-Kasparov 2003, Hiarcs-Bareev 2003 and >Junior-Kasparov 2003 > >I may have missed some matches, but if I did it was not my intention or cherry >picking. I deliberately excluded Hydra-Adams, since the discussions have been >about Adam's supposedly poor decision making process in choosing 1...e5 as his >defense of choice, and this decision had to be made prior to the match. I also >only looked at games where the computer played white, since that is what the >ruckus has all been about. > >The results from the above matches were: > >1.e4 e5 white (computer) scored 50% in 5 games >1.e4 other white (computer) scored 68% in 11 games >not 1.e4 white (computer) scored 67% in 3 games > >If I were Adams, and 1...e5 was the mainstay of my opening repertior, I would >not see anything in these statistics to change my mind. Perhaps people who have >been vociferous about Adams "poor opening choice" may have been coloring their >thinking based on Crafty blitz games on ICC. These are hardly the games upon >which to make ones opening choices for a serious tournament time control match >with money on the line. > >Below is a table of results for the games. Scores are from the white (computer) >perspective. > > opening: 1.e4 e5 1.e4 other not 1.e4 > event score # games score # games score # games >Deep Blue-Kasparov 1996 0 1 1.5 2 0 0 >Deep Blue-Kasparov 1997 1 1 1.5 2 0 0 >Deep Fritz-Kramnik 2002 0.5 2 0 0 1.5 2 >Rebel-van Wely 2002 0 0 2 2 0 0 >X3D Fritz-Kasparov 2003 1 1 0 0 0.5 1 >Hiarcs-Bareev 2003 0 0 1 2 0 0 >Junior-Kasparov 2003 0 0 1.5 3 0 0 > total 2.5 5 7.5 11 2 3 > score 50% 68% 67% > >-Robin Statistics based on 5 (or 3,or 11) games are meaningless. Michael
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