Poisoned Pawn Variation


Poisoned Pawn Variation

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Ilmars Cirulis    (2007-06-23)
Poisoned Pawn Variation

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 h6 11.Bh4 dxe5 12.fxe5 Nfd7 13.Ne4 Qxa2 14.Rd1 Qd5 15.Qe3 Qxe5 16.Be2 Bc5 17.Bg3 Bxd4 18.Rxd4 Qa5+ 19.Rd2 O-O 20.Bd6.

Ilmars Cirulis    (2007-06-23 06:02:44)
Black 20th move...

20.-- Re8 is losing. Search for games and you will see. But 20.-- Rd8 is drawish, IMO. And I don't understand why I don't play it?

Ilmars Cirulis    (2007-06-23 06:06:36)

"And I don't understand why I don't play it?"

Right: And I don't understand why noone play it?

Thibault de Vassal    (2007-06-23 06:11:39)
Poisoned Pawn Variation

Was this line often played !?

Ilmars Cirulis    (2007-06-23 06:26:21)
Poisoned Pawn Variation

Between engines:

Rybka vs Shredder in WCCC Round 11 [Re8 1-0]
Flyingfatman vs Mission control in Freestyle Final Round 1 [Re8 1-0]
Fritz vs Junior Game 3 [Re8 1-0]

Ilmars Cirulis    (2007-06-23 06:32:15)
Between humans...

... games must be too. But I can't find them.

Ilmars Cirulis    (2007-06-23 06:51:09)
Human games..

[Event "Bundesliga 2006-7"][Site "Berlin GER"][Date "2007.??.??"] [White "Luther,T"][Black "Ftacnik,L"][Round "9"]
20.-- Nc6 21.Bxf8 Kxf8 22.O-O Qb6 23.Rxf7+ Kg8 24.Rxg7+ 1-0

[Event "II Rapid"][Site "Canada de Calatrava ESP"][Date "2007.??.??"][White "Shirov,A"] [Black "Guliyev,N"][Round "4"]
20.-- Bd6 Nc6 21.O-O f5 22.Bxf8 Nxf8 23.Nd6 b5 24.Bf3 Bd7 25.Nxf5 exf5 26.Rxd7 Nxd7 27.Bxc6 Rd8 28.Bxd7 1-0

[Event "Corus A"][Site "Wijk aan Zee NED"][Date "2007.??.??"][White "Anand,V"][Black "Van Wely,L"][Round "9"]
20.Bd6 Nc6 21.Bxf8 Nxf8 22.O-O Bd7 23.Nd6 Ne5 24.Nxb7 Qc7 25.Nd6 f6 26.c4 Bc6 27.Ra1 Nfd7 28.Qd4 a5 29.Nb5 Qb6 30.Qxb6 Nxb6 31.Rd6 Nbd7 32.Nd4 Be4 33.Nxe6 a4 34.Nc7 Ra5 35.Ra6 Rxa6 36.Nxa6 Bc6 37.c5 Bb7 38.Rc1 Nc6 39.Nc7 Nd4 40.Bc4+ Kf8 41.Rd1 1-0

[Event "Corus A"][Site "Wijk aan Zee NED"][Date "2007.??.??"][White "Motylev,A"][Black "Anand,V"][Round "2"]
20.Bd6 Rd8 21.Qg3 Qf5 22.Be5 Qg6 23.Qh4 Nc6 24.O-O f5 25.Bh5 Qh7 26.Bb2 fxe4 27.Rf7 Rf8 28.Qf2 Rxf7 29.Qxf7+ Kh8 30.Rf2 e5 31.Qd5 Nf6 0-1

[Event "ch-USA"][Site "Stillwater USA"][Date "2007.??.??"][White "Shabalov,A"] [Black "Ehlvest,J"][Round "7"]
20.Bd6 Re8 21.O-O f5 22.Qg3 Nc6 23.Qg6 Qd8 24.c4 Ne7 25.Qg3 fxe4 26.Bc7 Nf5 27.Rxf5 Qe7 28.Bd6 Qd8 29.Bc7 Qe7 30.Bd6 1/2-1/2

[Event "Bundesliga 2006-7"][Site "Baden Baden GER"][Date "2007.??.??"][White "Shirov,A"][Black "Ftacnik,L"][Round "15"]
20.-- Re8 21.O-O f5 22.Qg3 Nc6 23.Qg6 Qd8 24.Bc4 Kh8 25.Ng5 Qxg5 26.Qxe8+ Kh7 27.Qxe6 Nf6 28.Qe2 Ne4 29.Rd3 Qg6 30.Ba3 Ne5 31.Rd4 Qb6 32.Rfd1 Nc6 33.Qe3 Nxd4 34.Qxd4 Qxd4+ 35.Rxd4 b5 36.Bd3 Ra7 37.Rd8 Be6 38.Re8 Bc4 39.Bxe4 fxe4 40.Rxe4 Rd7 41.Bb4 Kg6 42.Re7 Rd1+ 43.Re1 Rxe1+ 44.Bxe1 Kf5 45.Ba5 h5 46.g3 Ke4 47.Kf2 g5 48.c3 g4 49.Bb4 Kd3 50.Ba5 Bf7 51.Bb4 Bg6 52.Ba5 Kc4 53.Ke3 Kb3 54.Kd2 Ka4 55.Bc7 a5 56.Bd8 b4 57.cxb4 axb4 58.Bf6 Kb3 59.Bg7 Kc4 1/2-1/2

Ilmars Cirulis    (2007-06-23 06:53:27)
9 games at least.

3 engine games and 6 human games.

Ilmars Cirulis    (2007-06-23 06:57:30)

I am surprised that noone engine play 20.-- Rd8. Why?!

Michael Aigner    (2007-06-23 12:55:32)
Rybka 2.3.2a would!

Hi! Rybka follws the mentioned game Motley -Anand but finds an improvement at move 24. 24. Bh5 Qf5 26. Bxg7 with an unclear (IMO, according to Rybka equal position. it could follow Nc5 (Kxg7 26.Rf1) 26. Rxd8+ Kxd8 27.Kd6 Kd3+ 28.cxd Qa5+ 29.Ke2 Kxg7 still unclear, but in an otb game i would shourly prefer to play white. I can imagine when you look deeper in the position after Bh5 you might find a win for white - or lets say a variation in which it is almost not possible for black to defend in an otb game even when the objective evaluation says the position is equal. This could be the reason why Re8 is prefered by strong human GMs.