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Subject: Re: Positional/Real Sacrifice

Author: Bruce Moreland

Date: 16:20:35 11/29/99

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On November 29, 1999 at 18:42:12, Peter McKenzie wrote:

>On November 29, 1999 at 16:26:13, Bruce Moreland wrote:
>
>>I think that 1. Bxh6 gxh6 2. Qxh6 wins by force.
>>
>>2. ... f5 3. Bxf5 Nd4 4. Bd3
>>
>>Black's pieces are overloaded and he can't defend the weak spots in his king
>>position.  As near as I can tell he's going to lose a knight and remain three
>>pawns down.
>>
>>Perhaps there is a better defense at move 2 or 3 but I doubt it.
>>
>>I don't know if it is possible to see this statically but I doubt it.  Maybe
>>those that see it quickly are being speculative.
>
>Right, there are some big king safety terms in action I guess.
>
>Did you try the position on Ferret?  If so, at what depth does it find Bxh6?

I ran it on a P6/200 and it finds it in ply 10, in a minute, at about +1.  I
left it for a couple of hours and when I came back it was failing high in ply 14
at +1.67.  Perhaps it found 4. Bd3 at that point, I don't know, since I stopped
it in order to answer your questions.

Ferret can be a little speculative but it tends to speculate more in the center.
 I'm not real big on the Bxh6 thing, and perhaps I am wrong.  When it wants to
play a move like that it typically wins, because it finds material compensation.
 It won't play that move as often as it should, and setting the sac up against
the program is a good way to beat it, as well.

I would like to know if othe programs are really that much better at seeing
through king stuff than mine is, or whether they are just flat out going for it.

bruce



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