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Old November 28th 06, 10:01 PM posted to
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First recorded activity by ChessBanter: Jun 2006
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Default Kramnik overlooks mate in one

Greetings. This may be the biggest grandmaster blunder ever. I was
actually present in the hall in Biel when Hübner missed an obvious
back-row-check mate-in-two against Petrosian, and that caused some
commotion; and there's the famous one where Petrosian outplayed
(I think it was) Bronstein in a wonderful king's-indian game and then
moved his queen en-prise for no reason; but this one's the biggest:

DEEP FRITZ - Kramnik,V (2750) [D10]
The Duel Bonne GER (2), 27.11.2006
[notes by IM Malcolm Pein]

1.d4 d5 2.c4 dxc4 3.e4 b5 4.a4 c6 5.Nc3 b4 6.Na2 Nf6 7.e5 Nd5
[White gets a space advantage but Black's position is anchored
long term by the Nd5, an ideal line to play against a computer.]
8.Bxc4 e6 9.Nf3 a5
[9...Be7 10.Bd2 a5 11.Nc1 was Kasparov-Svidler Russian Ch 2004,
a superb game won by White. Fritz copies Kasparov.]
10.Bg5 Qb6 11.Nc1 Ba6
[11...h6 12.Bd2 Ba6 13.Qe2 Bxc4 14.Qxc4 Nd7 15.Nb3 c5 16.0-0 Be7
17.Rfc1 cxd4 18.Qb5 Qxb5 19.axb5 a4 20.Nbxd4 0-0 21.Nc6 Bc5 22.Ne1 a3
23.bxa3 Rxa3 24.Nc2 Rxa1 25.Nxa1 Ra8 26.Nb3 Ra2 27.Kf1 Bb6 28.Be1 Ra3
29.Nd2 Rc3 30.Rb1 Rc5 31.Nxb4 Rxb5 32.Nd3 Rxb1 33.Nxb1 Bd4 34.f4 g5
35.g3 gxf4 36.gxf4 Kh7 37.Ke2 Nc5 38.Nxc5 Bxc5 39.Kf3 Kg6 40.Nc3 Nxc3
41.Bxc3 Kf5 42.Bd2 h5 43.h3 Bb6 44.Bc1 Bc5 1/2-1/2
Van Wely,L (2648)-Lautier,J (2680)/Khanty Mansyisk RUS 2005]
12.Qe2 h6 13.Be3
[Fritz offers an exchange on e3 but Kramnik does not part
with his best piece.]
13...Bxc4 14.Qxc4 Nd7 15.Nb3 Be7 16.Rc1 0-0! 17.0-0
[17.Qxc6 Qxc6 18.Rxc6 N7b6 regains the pawn with advantage.]
17...Rfc8 18.Qe2 c5 19.Nfd2 Qc6! 20.Qh5 Qxa4 21.Nxc5 Nxc5
22.dxc5 Nxe3 23.fxe3 Bxc5 24.Qxf7+ Kh8 25.Qf3 Rf8
{Black's queenside pawns give him the edge.]
26.Qe4 Qd7 27.Nb3
[27.Nf3 Qd5! 28.Qxd5 Bxe3+ 29.Kh1 exd5]
27...Bb6 28.Rfd1 Qf7 29.Rf1 Qa7 30.Rxf8+ Rxf8 31.Nd4 a4
[31...Qf7!? 32.h3 Qf2+ 33.Kh2 Qxb2 34.Nxe6 Qxc1 35.Qg6 Rg8 36.Ng5 hxg5
(36...Qg1+ 37.Kxg1 Bxe3+ 38.Kf1 Bxg5) 37.Qh5#]
32.Nxe6 Bxe3+ 33.Kh1 Bxc1
[33...Re8 34.Rf1 Qa6 35.Re1 Qxe6 36.Rxe3 Qa6 37.h3 a3 38.bxa3 bxa3 39.Re1
a2 40.Ra1 Rf8 41.Kh2 Qe6 42.Qd4 Rf2! would have given winning chances.]
[34...Kg8 35.Ng6 Bxb2 36.Qd5+ Kh7
(36...Qf7? 37.Ne7+ Kf8 38.Qd8+ Qe8 39.Ng6+ Kf7 40.e6+ Qxe6 41.Qf8+)
37.Nf8+ Kh8 38.Ng6+ Kh7 39.Nf8++/=]
35.Qh7# 1-0

Regards, Peter


AUS/TAS/DPIW/CIT/Servers hbt/lnd/l8 6233 3061
Pasaré, pasarémos dice el agua y canta la verdad contra la piedra
-- Pablo Neruda
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