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Subject: Re: GM Christiansen's rook sac -- brilliant or not?

Author: martin fierz

Date: 21:11:48 10/01/02

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On October 01, 2002 at 21:41:34, John Merlino wrote:

>And, how do they evaluate this positon that resulted from it? Larry played f3,
>which certainly appeared to be good. Susan Polgar said that she thought Qh1+
>would lead to a won endgame.
>
>[D]8/p1p5/Pp1p2nk/1P1B3q/2P1Ppr1/1Q4p1/R5P1/3R1K2 b - - 0 57
>
>And, finally, if Larry had played Qh1+, this position would have resulted. What
>say your programs now? Do they play Qf3+, Ne5+ or Qh3? Any input from strong
>humans would also be greatly appreciated....
>
>[D]8/p1p5/Pp1p2nk/1P1B4/2P1Ppr1/1Q1K2p1/R5q1/3R4 b - - 0 59

to answer your subject line: it is definitely brilliant. i think it wins, but
even if it were only a draw, it is a beautiful move. since it's clear that only
black has winning chances after it, it is not only beautiful but also strong ->
brilliant anyway!

personally i like the simple ...Qh1+ Ke2 Qxg2+ Kd3 Qf3+ Kc2 Qxb3+ Kxb3 f3, where
it is clear that only black can win (white is paralyzed by black's passer duo,
eg Kc3 Kg5 Kd4 Kf4 Rf1 - now it should be quite clear that white can only wait
and hope - in vain, i guess, as it seems to me that ...g2 Rg1 Kg3 Ke3 Ne5 should
win now, on Rf2 Rh4 (not Rxe4+ which looks good but seems to lose!)).
i produced the variations above playing around with fritz, perhaps there are
better defences for white, but i don't think there are!

aloha
  martin



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