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Subject: Re: Some Philosophical questions on the limits of Computer chess

Author: Dann Corbit

Date: 15:42:03 01/25/02

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On January 25, 2002 at 18:30:14, karen Dall Lynn wrote:
>On January 25, 2002 at 17:53:39, Dann Corbit wrote:
>>On January 25, 2002 at 17:49:13, Albert Silver wrote:
>>[snip]
>>>I disagree. Two things: Heinz's study showed that adding plies doesn't linearly
>>>add strength. Second, I think the comparison with Kasparov is amiss. Kasparov
>>>does far more than calculate plies, and he would bring that with him in any
>>>game. You can take a dry middlegame with no magic ruptures or sacrfices, and
>>>Kasparov might tell you in a second that it is a draw. Why? Not because he
>>>calculated it to the last ply, but because his judgement and vision allow him to
>>>make that assessment. I do not believe for one second that perfect play would
>>>suddenly change that. The perfect player might know that h4 and an enormous
>>>number of useless moves can or will lead to a loss, but that doesn't mean
>>>Kasparov will play them.
>>
>>I think it's hero worship.  If you take a 2400 player against Kasparov, and the
>>2400 player is going to get slaughtered for the very reasons that you mention.
>>If you take a 3200 player against Kasparov, Kasparov will look just as bad as
>>the 2400 player did.  Deep Blue, the second version, made Kasparov look almost
>>human.  A computer that searched 500 times deeper would humble Kasparov.  I
>>believe it would win 1000 out of 1000 games with no draws.
>>
>>I think most openings have some small bugs in them.  Probably mainly
>>undiscovered and it will take centuries to discover them.  A perfect player, by
>>definition makes no mistakes.  If there is a move that is one trillionth of a
>>pawn better than any others, then he takes it.  If there is any way to lose at
>>all during any move of the game, then it will occur playing against the perfect
>>player.
>
>I think we are better of not understanding the perfect player as an unlimited
>deep-searcher. Now I see that it is not even inconsistent to say his being a
>perfect player does not entail he has to win every game.
>
>The perfect player would rather be that player that always plays the best
>possible next move. No matter how he gets to it - I'd say he would be more
>perfect if he reached out this very best next move by *insight*, sudden
>compreehension, gestalt vision, not by aritmethizing over plyes.

If he/she plays the perfect move, it really does not matter how he/she arrives
at the answer.

>However chess
>has rules. Some say that the defaut condition of the board before the first
>white move slightly favors white. Then the perfect player as always making the
>best possible move has to win all games he is white.
>
>But what if he plays black?

I think he wins all games against an imperfect player.  Against a perfect white
player, the outcome is unknowns (nobody knows is chess is a win/loss/draw for
white).

>Perhaps the making of the best possible next black movie is not enough to win...
>because the other player may be strong enough to sneak with the initial white
>advantage along all the factual best black moves streaming from the perfect
>player's mind.

I doubt it.  Why can't a 5 year old do this to Anand?

>Then the perfect player may even lose without scratching his perfection, but
>rather because of the rules of chess that he is bound to obey otherwise there
>would be no chess to his being the perfect chess player.
>
>But the way a perfect player loses in black may be much more art and vision than
>the way a strong but not perfect player wins in white.
>
>This is a quite fuzzy question, full of subtle sides.

Indeed.  And (in fact) if he/she is a perfect chess player then...
Why not also a perfect gentleman, sometimes giving away a game in the spirit of
kindness?

We don't have any perfect players, nor are we likely to come across any.  But it
does make for interesting debate.



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