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Subject: Re: Nice tactical sacrifice plus king safety tuning.

Author: Roy Eassa

Date: 14:55:17 12/09/02

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On December 08, 2002 at 18:08:41, Colin Frayn wrote:

>[D]r1b3k1/2pnn1bp/pp1p3r/2PPp1pq/1P2Pp2/Q1NN1P1P/P3BBP1/2R2RK1 b - -
>
>This just came up in an ICC game between Beowulf and Fritz 8.  Fritz (black)
>played Nxc5! here.  It's fairly tricky to spot - might require some searching.
>Beowulf had missed this rather nice tactical shot, which of course gives a
>devastating attack on white's king.
>
>Pity ... I was winning up to that point :(
>
>Cheers,
>Col


It appears that almost any move by that knight wins; also ...bxc5 first wins
too.

1...Nxc5!

   [also winning is 1...bxc5 2.Qa5
      (2.bxc5? Nxc5 and Black wins as in the main line)
    2...Nb6
       (2...Nf6 3.Qxc7 Bxh3 -+)
    3.h4 gxh4 4.bxc5 h3 5.g4 fxg3 6.Bxg3 Rg6 7.Kh1 Rxg3 8.cxb6 Qh4
    9.Rg1 Rg2 10.Rxg2 hxg2+ 11.Kxg2 Bh3+ 12.Kh2 Bh6 -+]

   [also winning is 1...Nf6 or 1...Nf8 or probably others]

2.Bxc5

   [2.bxc5 Bxh3 as in the main line]

   [2.Nxc5 Bxh3 as in the main line]

   [2.Ne1 Bxh3 as in the main line]

   [2.h4 Nxd3 3.Bxd3 gxh4 4.Kh2 h3 5.g4 Bxg4! 6.fxg4 Qxg4 7.Rg1 Qf3
    forking the bishops]

2...Bxh3 3.Ne1 Bxg2 4.Nxg2 Qh2+ 5.Kf2 Qg3+ 6.Kg1 Rh2 7.Rf2 Qh3 and Black mates



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