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Subject: Re: another example of giving up the exchange for the win by Rybka

Author: John Merlino

Date: 21:16:37 12/28/05

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On December 28, 2005 at 21:06:02, Mike Byrne wrote:

>Rybka v1.0 Preview 2 x64 - Gandalf60 [D21]
>Blitz_5_5_QUAD RR_2 WIN-64-MB (2), 26.12.2005
>
>1.Nf3 d5 2.d4 Nd7 3.c4 dxc4 4.e4 Nb6 5.Bxc4 Nxc4 6.Qa4+ c6 7.Qxc4 Nf6 8.Nc3 b5
>9.Qe2 a5 10.Qc2 Ba6 11.e5 Nd5 12.e6 f6 13.0-0 Nxc3 14.Qxc3 Qd5 15.Re1 b4 16.Qc2
>g5 17.a3 b3 18.Qd1 h5 19.Bd2 Bd3 20.Rc1 Bc2 21.Rxc2 bxc2 22.Qxc2 Bh6 23.Qg6+ Kd8
>24.Qxh5 Rb8 25.Bc3 Kc7 26.h3 Rbg8 27.Nh2 Kb8 28.Ng4 Bg7 29.Qf7 Qd8 30.Ne3 Bf8
>31.Nf5 g4 32.h4 g3 33.fxg3 Rg4 34.b4 a4 35.Bd2 Kb7 36.Bf4 Rhg8 37.Rd1 Qd5
>38.Nxe7 Bxe7 39.Qxe7+ Ka6 40.Qc5 Qxc5 41.dxc5 Re8 42.Re1 Kb7 43.h5 Rg7 44.h6
>Rge7 45.g4 Rg8 46.g3 Kc8 47.Kf2 Ree8 48.Kf3 Re7 49.Re2 Kd8 50.Rd2+ Kc8 51.Rd6
>Rc7 52.Ke4 Ra7 53.Rxc6+ Kd8 54.Rb6 Ra8 55.h7 Re8 1-0

This shouldn't be a difficult one.

[D]r3kb1r/4p3/2p1Pp2/p2q2pp/3P4/Pp3N2/1PbB1PPP/2RQR1K1 w kq - 0 21

CM9_R1 finds it instantly, and actually sees 20.Rc1 instantly as well, expecting
the exchange sac to occur and giving it a score of about +1.

Still a pretty win, though.

jm



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