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Subject: Re: Nice bishop sac or?

Author: Jonas Cohonas

Date: 01:53:02 04/10/05

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On April 10, 2005 at 04:00:33, piet de hoop wrote:

>[D] r1b2rk1/pp1pnppp/8/q2P4/1b1Q4/5N2/PPB2PPP/R1B2RK1 w - - 0 13
>
>Yesterday i got this position during a clubgame and immediately calculated the
>bishop sac on h7. I didn't see everything but i really liked the idea to go for
>the sac and later on i won the game. At home i analyzed this position with the
>computer, and found out that pawn move to a3 (at short time controls) is
>favourable for computerprograms. (Bishop at b4 doesn't have a good place to move
>to).
>After forcing the bishop move to h7 the computer analysis where also positive
>for white. Is there a program that agrees with me and play the bishop sac
>instead of a3?
>
>regards
>
>Piet

I think Bxh7+ is the best move here:

1. Bxh7+ Kxh7 2. Qh4+ Kg8 3. Ng5 Re8 4. Qh7+ Kf8 5. Qh8+ Ng8 6. Nh7+ Ke7 7.
Bg5+

[D] r1b1r1nQ/pp1pkppN/8/q2P2B1/1b6/8/PP3PPP/R4RK1 b - - 0 7

Which is completey forced, but i suspect that chess programs will be having
trouble finding Bg5+ down the line when given the position before Bxh7+.

After Bg5+ black can only play Kd6

[D] r1b1r1nQ/pp1p1ppN/3k4/q2P2B1/1b6/8/PP3PPP/R4RK1 w - - 0 8

(after f6?? Qxg7+ but black is already lost here so not much difference.)

[D] r1b1r1n1/pp1pk1QN/5p2/q2P2B1/1b6/8/PP3PPP/R4RK1 b - - 0 8

so Kd6 Qxg7 Re2 Bf4+

[D] r1b3n1/pp1p1pQN/3k4/q2P4/1b3B2/8/PP2rPPP/R4RK1 b - - 0 9

or Kd6 Qxg7 Kc7 Rac1+

[D] r1b1r1n1/ppkp1pQN/8/q2P2B1/1b6/8/PP3PPP/2R2RK1 b - - 0 9

or Kc7 Qxf7 or K c7 Bf4+ even, but it is all over here.

How did the game proceed?





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