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Subject: Re: So what exactly is still missing from computer chess?

Author: Sune Fischer

Date: 07:20:26 07/05/02

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On July 05, 2002 at 08:06:17, Marc van Hal wrote:

>On July 04, 2002 at 12:35:49, Sune Fischer wrote:
>
>>On July 04, 2002 at 12:08:37, stuart taylor wrote:
>>
>>>On July 04, 2002 at 11:34:13, Sune Fischer wrote:
>>>
>>>>On July 04, 2002 at 10:40:31, Thorsten Czub wrote:
>>>>
>>>>>they lack creating a plan. and choosing the right opening for the right
>>>>>opponent.
>>>>
>>>>One could also say that they investigate all possible plans.
>>>>
>>>>Some of the great moves in history, eg. where Fischer seemingly sacrifices a
>>>>rook for no reason at all in an "equal position", doesn't take computers more
>>>>than a few seconds to find.
>>>
>>>I don't think they'ii easily find that rook (exchange) sacrifice Petrosian made
>>>against (i think) Reshevsky.
>
>
>
>>I'm not saying they can find all great moves ever played, only that they have
>>less of a problem with the unintuitive moves. Many of those exclamation mark
>>moves made by grandmasters are simply piece of cake for the progs.
>>
>>-S.
>
>
>
>What about Kasparov bischop sacrefice in his game against chiburnatse in a
>Gligoric Kings Indian
>or his rook sacrefice for nothing but position against Karpov. in a Ruy Lopez
>>This kind of moves will not be played by programs.

You should post the position so we know what we are talking about if you want to
give an example:)

I picked up my book of Fischer's 60 memorable games, went to the first game
(Fischer-Sherwin 1957).

[D]1rb2rk1/p4ppp/1p1qpnn1/6N1/2pP3P/2P3P1/PPQ2PB1/R1B1R1K1 w - - 0 1
Best move 18. Nxh7!
Crafty sees Nxh7 after 5 seconds - no problem!

Same game, later:
[D]2b2r2/pr3pkn/1p2p3/8/2pP1B1q/2P5/PPQ2PB1/R3R1K1 w - - 0 4
Best move 24.Re4!
Crafty agrees after 13 seconds.

many of these moves are within the search depth of programs, I guess it is
mostly because of their "strange look" that they were given a "!".

>But something which is a bigger weaknes is finding simply positional moves to
>keeping a grip on the position.
>
>And in the mean time defendig it self from counter attacks.
>resulting to more clear positions.

Who has the advantage if the position is clear?
I would say a "clear" game is more likely to end in a draw, if the position is
complicated the stronger player has greater chances of outsmarting his opponent,
IMO anyway.

>Attacking is fine but defending is just as important.

That is a style you are talking about, I'd say the object of the game is to
checkmate you opponent so attacking is more important (and more fun:).

-S.

>Maybe it would be nice to make some epd's of defending moves.
>
>Only when you find a better balance of Defending and Attacking a program could
>improve.
>Though technicaly this is a dificult task.
>
>Or how to handle  positions after f4,d5 e5 is some openingslines
>
>So there still is enough space to explore!
>
>Regards Marc van Hal



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