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Subject: Re: Question to Jeroen: What went wrong with Tiger?

Author: Mig Greengard

Date: 09:09:33 08/25/01

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On August 25, 2001 at 07:33:41, Uri Blass wrote:

>
>My gambitTiger expects Nh6 and I also read that tiger expected the right move
>Nh6 in the game.

Expecting it and recognizing the strength of it are two different things, if
barely. On general principles, it should never have been allowed. ...f5 is the
problem. It dramatically underestimates Nh6.

>>2) King safety. Not valuing enough the fact that with the knight on h6 the black
>>king would be doomed in the long run. A human Master plays 18.Nh6 instinctively.
>
>I am not sure about it.
>The knight at h6 cannot move to another square without losing material so if
>black can survive the attack the knight may be trapped.
>
>I prefer Nh6 but I expect strong humans to think about it.

Certainly think about it, but I was speaking for myself as well, as a strong
(2310) human who was very surprised by ...f5 during the game. GM Alterman also
considered black to be positionally lost after ...f5 Nh6. The knight is
supported by the bishop and could always be rescued by a timely g4. Nh6 is not
an obvious move, but it is clearly the strongest and the refutation of ...f5. If
Tiger had understood that, as Junior did, it would not have played it.

It's the general versus the concrete. "My king is stuck in the middle" (human)
versus "I don't see a concrete line in which my king position costs me material"
(program). What exactly runs through Junior's chips to make it love Nh6 so much
*instantly* is another story, but it's doing something right. It's the only
program I've checked that immediately rates ...f5 as the blunder it is.

Saludos, Mig




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