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Subject: Re: Checkers: Las Vegas and Chinook

Author: Jeroen Noomen

Date: 11:46:09 09/09/02

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On September 09, 2002 at 12:15:19, Uri Blass wrote:

>I do not know much about checkers and I never looked at the games but
>if the opponent cannot beat you when you play for a draw then it means that the
>opponent is not better than you.


You cannot have a thorough opinion about this, if you don't know the game.
I'm not an checkers expert either, but I know that Lafferty knew the
openings well and also the published play. His tactics against Chinook
were simple: Avoid any unknown line, play the published lines and take
zero risk. In that case it is almost impossible to win. Which absolutely
doesn't mean that Chinook is not stronger than Lafferty. As a matter of
fact: When Tinsley died, Chinook was by far the highest rated player in
the world. And it WAS better than Lafferty that time.


>Could Lafferty draw every game or almost every game against tinsley?

If I am right, they drew almost all their tournament games.
But that is because they were friends and Lafferty called
Tinsley 'his mentor'. Sometimes they finished their 4 tournament
games within 10 minutes, when the others didn't even finish the
openingphase of their first game :-)


>If he could not do it and could do better against chinook then it means that
>chinook was weaker than tinsley.


The first match Chinook lost by 4-2. But it was unlucky: Chinook
led by 2-1 and achieved something NOBODY had ever managed to do:
To beat Tinsley 2 times in one match. Then the horror struck, as
Chinook lost a game by forfeit in a drawish position.

The Chinook in the 2nd match was much stronger than the Chinook
in the first match: Faster machine, more endgame databases and a
better evaluation function. So it is very well possible that the
Chinook of the 2nd match was a better player than Tinsley. Too bad
history took such a course that this couldn't be proved :-).

Just read Jonathan Schaeffer's book. I am sure you will love it!

Jeroen



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