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Subject: Re: Answers

Author: Robert Hyatt

Date: 10:06:55 02/15/03

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On February 15, 2003 at 10:30:00, Amir Ban wrote:


>
>  Opening preparations: Kasparov is no. 1 in this regard, and he showed what
>this means in game 1. However, Boris put up an excellent fight and in the second
>part of the match it appeared that we were getting the upper hand.
>
>  Tactics: Strangely enough, towards the end of the match I realized that Junior
>is not outplaying Kasparov tactically. I have seen enough games against
>grandmasters where this happened to realize that nothing of the sort is
>happening against this particular opponent. For this reason I was less
>enthusiastic about game 5 than others arguing that early complications lead us
>nowhere.


A note before I comment:  (1) I think you guys did great in the match.  I
can't imagine being disappointed with drawing with arguably the best player
in the world.  (2) I don't think any _good_ chess player is surprised with
the concept of the computer getting out-tacticaled...  Computers excel at
wide "bushy" tactics with lots of pieces doing lots of things.  They are _not_
good at narrow/deep tactics, which is where a GM excels.



>
>  Positional understanding: perhaps even more surprising than tactics, Junior
>was holding its own in positional play, the best examples of which were games 3
>& 4. We have had our experiments in the past with so called anti-GM strategies
>and with avoiding closed positions and everything else that according to
>conventional wisdom is supposed to be unsuitable for computers and all these
>were left in the wastebin for this match.
>
>  Endgames: This aspect of the game was hardly discussed in this match.
>
>  In the end Deep Junior played not only as strongly as a super-GM (a debate
>that has been going in this forum for several years too long), but actually as a
>super-GM. I've seen opinions expressed that the programs are 2500 in
>understanding and 2900 in tactics, so you get an overall 2700 performance. I'm
>not buying it. The same for some comments like "typical computer move" which in
>some cases were so unthinking that they were seemingly generated by a computer.
>


I disagree with the "played like a super-GM" player, however.  I doubt you
will find _any_ 2200 FIDE player that would play as badly as DJ played in
the first three games, up until move 30 or so.  Game 1 would not have been
played by any 2000 player I know, myself included.  So saying that it has
super-GM positional understanding is _way_ _way_ offbase.  Yes, it played
good moves at times.  But it also played _horrible_ moves at times.  And I
am not just talking about tactically horrible moves such as the blunders that
Kasparov dropped on the board, I am talking about moves such as taking the
g-pawn and getting exposed to a horrific attack.

So while I certainly think DJ played very well, I would be hard-pressed to
think it played like a super-GM positionally.  I think its "super-GM" skill
is great resiliance, the ability to play game after game, at the same "level"
repeatedly.  Compare Kasparov at game 1 vs Kasparov at game 5-6.  That is a
factor I had not considered, and it is a factor that I don't _know_ will apply
to all human opponents, but at least in watching Kasparov and Kramnik, it seems
to be a silicon advantage that offets a lot of tactical/positional weaknesses.

But to think that a "super-GM" would play game 1 as black is a stretch I'm not
willing to make.  To think that a "super-resiliant-GM" would play like DJ did
is perfectly believable...

I think it was an _outstanding_ result, regardless of mistakes made by either
the program or the human...






>  I believe that the two different ways of playing chess: human chess and
>computer chess are starting to converge at their highest level. To be sure, the
>programs are from time to time conceding their silicon origins, but in the same
>way we humans must admit that when events exceed our understanding, then
>something mechanical in our own thought processes reveals itself.
>

I think it might be more related to biological fatigue than anything else.  I
would have hated to play the same kasparov that played game 1, five more games.
IE the typical golf-cart can't touch a 100M sprinter, but it can keep on
going until the human drops, and it will eventually win the race.



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