Poisoned Pawn Variation

The Pawn variation is a variation in the Najdorf Variation of the Sicilian Defense in chess. It carries the ECO code B97. In English, the opening of a Poisoned Pawn variation is known as Black will have the opportunity to hit a supposedly " poisoned peasants."

The basic position of the variant arises after the moves (see also: Chess notation):

1 e2- e4 c7 - c5 ( the Sicilian Defence ) 2 Sg1 -f3 d7 - d6 3 d2 -d4 c5xd4 4 Sf3xd4 Ng8 - f6 5 Nb1 - c3 a7 - a6 ( The Najdorf Variation ) 6 Lc1 - g5 - e6 e7 7 f2 - f4 Qd8 - b6

With his last train Black threatens the pawn on b2, which is referred to as poisoned as the beating of the farmers is linked to another tempo loss by the white man could exploit the exposed position of the black lady and in forging ahead with his character development. Black on the other hand applies it to stem the white initiative and to save its minimal material advantage into a won endgame over.

History

The Poisoned Pawn came in 1954, tournament chess in the games Rashid Gibyatowitsch Neschmetdinow - David Bronstein, Belgrade - Sherbakov, Riga and Egon Joppen. It has since been repeatedly applied by grand masters of the world leaders in the 1960s to the 1970s, for example, by Bobby Fischer, Viktor Korchnoi and Mikhail Tal. In the 1990s, until his retirement from chess (2005) Garry Kasparov was occasionally on the variant, so he won around with black leaves the fourth game of the match at the World Chess Championship 1993 against Nigel Short. Vishy Anand played in 2007 at the Corus chess tournament with both white against Loek van Wely and Black against Alexander Motyljow two intricate parts in this play, which he could both win.

1972 in Reykjavik, the Poisoned Pawn was played for the first time at a World Chess Championship, it was Bobby Fischer in the so-called Match of the Century, the ... Qd8 - b6 played the sharp train 7 in the 7th and 11th competetive game against Boris Spassky. In the seventh game of Fischer scored an advantage, but he could not apply to the victory, while he was clearly beaten in the 11th game after recovering from tangles.

The evaluation of the variant is still the subject of theoretical investigations and trials. It is not clear whether the farmer is really " poisons ".

Variants

In the diagram position, the White has two main continuations, with

8 Nd4 -b3 he can go the tangles out of the way and the lady obstruct the view according to b2. The withdrawal of the jumper is compensated in that the lady is now placed on b6 unhappy and usually must withdraw after c7 order to initiate with b7 - b5 the typical counterplay on the queenside can. The one with the chess on e3 associated exchange of queens ( 9 ... Qb6 10 -e3 - e2 Dd1 De3xe2 11 Lf1xe2 ) is regarded as slightly advantageous for White, he has space advantage and thus the freer play.
With 8 Dd1 -d2 begin the complicated Abspiele the Poisoned Pawn, White offers farmers to b2 and covers a precaution his knight on c3 to reveal 8 ... Db6xb2 threatened tower on a1 with 9 Nd4 -b3 or 9. Ta1 -b1 to be able to move away.

9 Nd4 -b3 also threatens women catch by 10 a2 -a3 and 11 Nc3 -d1 or 11 Ta1 -a2. The train 9 ... Db2 a3 gives the first lady an escape route. Spassky elected in 1972, first in the seventh game of the match then unknown train 10 Lf1 -d3, which led to a complicated drawn game. In the 11th game he played the conventional train 10 Lg5xf6 g7xf6 with deterioration of the black pawn structure. The main variant, 11 Lf1 - e2 Sb8 c6 - 12 has emerged 0-0 Bc8 - d7. White stand for his 13th train various options available, such as proven Mikhail Tal 13 Le2 h5 - f4 - f5 and 13, and Garry Kasparov played in two games in 1982 against Elmar Məhərrəmov 13 Tf1 -f3, but today is 13 K g1 -h1 the most common train. Black can stop with 13 ... h7 - h5 the active white runners -up Le2 - h5 in the 13th (or earlier in the 11th or 12th train ). In this position (after diverter ) Spassky played the paradoxical 14 Nc3 -b1, b2 what Da3 - 15 could lead to a repetition of moves after 14 ... Nb1 - c3 -a3 Db2. Fischer gave way with 14 ... Da3 - b4 and got into a disadvantage.
Short in the championship game in 1993 against Kasparov, however, tried 14 Nc3 -d1.

Paul Keres led the 1955 Interzonal of Gothenburg, the train 10 e4 e5. His opponent Andrija Fuderer replied with 10 ... Nf6 - d7 and lost quickly after a tactical error. Thereafter, instead mostly continued with 10 ... Nf6 - d7 d6xe5 11 f4xe5 and now

12 Lf1 - c4 with a good game associated with the pawn advance opening the diagonal f8 -a3 with the liberation of the black-squared runner was Keres ' train against Alexander Kasimirowitsch Tolusch at the USSR Championship in Moscow in 1957. Comes in several variations by 12. Bf8 - b4 .. but the blacks benefit ( bondage motifs on the diagonal a5 - e1 and a7 - g1). 13 Tb1 -b3 - a5 Da3 14 0-0 0-0 15 Bg5 f6 - gives the critical position which first Robert Byrne in 1965 in his game against Larry Evans brought in the United States Championship on the board. While Evans took the piece sacrifice with 15 ... g7xf6 and allowed an attack on the castling position, 15 ... Sd7xf6 has 16 e5xf6 Rf8 -d8 17 Tb3xb4 Da5xb4 proven 18 Dd2 - g5 g7- g6 as playable.

12 Nc3 -e4 was played by Mikhail Tal against Tolusch 1956 in Leningrad. The victim of another farmers by 12 ... h7 - h6 13 Bg5 - h4 Da3xa2 was considered long for inferior, until the mid- 2000s decade, the strength of the train was 14 Tb1 -d1 discovered. In his game against Sergei Karjakin in Cap D' Agde 2006 Teymur Rəcəbov sacrificed after 14 ... Da2 -b2 15 Dd2 -e3 - c5 Bf8 16 Lf1 - e2 Sb8 c6 - 17, c2 - c3 Db2 a3 18 0 - 0 0-0 19 by means of the settlement Ne4 - f6 ! Sd7xf6 20 Lh4xf6 Sc6xd4 21 Td1xd4 Lc5xd4 22 De3xd4 g7xf6 23 e5xf6 a tower for a ♙ f6, which White an irresistible attack on the castling position guaranteed, with whom he won in 33 moves. Since then applies 12 Nc3 -e4 as the main feature.

10 f4 - f5 is the alternative plan of the White, which developed in the 1960s. The plan is a pressure game to the point e6 with Lf1 - c4, followed by a short castling, opening the f-file, possibly connected with the exchange on f6, after which the black kingside is weakened further. 10 ... c6 11 Sb8 f5xe6 f7xe6 12 Sd4xc6 b7xc6 13 e4 e5 d6xe5 14 Lg5xf6 g7xf6 15 Nc3 -e4 is the result. On the continuation 15 ... Bf8 - e7 16 Lf1 - h7 - h5 e2 was formerly often Tb1 -b3 -a4 Da3 19 c2 - c4 brought the piece sacrifice 17 18 Se4xf6 Le7xf6 with unclear prospects attack. In 2003 it was discovered instead the possibility of 17 Th1 -f1 -f3 Tf1 with the idea that White seems to bring in advantage. Therefore, black grips mostly back to the variant 15 ... Da3xa2 16 Tb1 -d1 - e7 Bf8 17 Lf1 - e2 0-0 18 0-0 Ta8 - a7, which, however, often leads to a perpetual check, such as the game Vallejo Pons - Garry Kasparov, Petrosian Memorial Tournament Moscow, 2004, the course in large parts of the game PGV Andersson - A. Poulsen, ninth Correspondence Chess Olympiad, Final 1992-1993 was foreshadowed. A possible alternative is 18 ... f6 - f5.
White can prepare the entanglements with the trains 10 Lg5xf6 g7xf6 11 Lf1 - e2 and
10 Lf1 - e2 - e7 Bf8 11 h7 - h6 0-0 12 Bg5 - h4.

8 Dd1 -d3 is a rarely performed but also dangerous possibility that has been revived lately among others by Azerbaijani players. After 8 ... 9 Db6xb2 Ta1 -b1 -a3 Db2 10 f4 f5 Sb8 c6 - 11 f5xe6 f7xe6 12 Sd4xc6 b7xc6 13 Lf1 - e2 - e7 Bf8 White has castled frequently in the 14th train briefly, or the position attacked the black king with 14 e4 e5 d6xe5 15 Lg5xf6 g7xf6 16 Le2 - h5 Ke8 -f8 under the victim of a second pawn, eg (after diverter ) in the game John Nunn - Garry Kasparov won, Brussels, 1987, where black could defend himself and after 27 moves. In the game Rauf Məmmədov - Dmitri Kokarew, European Individual Championship 2008, set white contrast with 14 Le2 - h5 ! g7- g6 15 e4 e5! continued, received after the settlement 15 ... Nf6 -d5 16 Tb1 -b3 - a5 Da3 17 Lg5xe7 Sd5xe7 18 e5xd6 Da5xh5 19 d6xe7 DH5 - h4 20 g2 - g3 Dh4xe7 21 0-0 lead in development and won after 29 moves. Lately, black gives way to the diagram position, mostly from. So, for example, held Alexander Grischuk in his game against Vüqar Həşimov to Elista in 2008 his queen's knight on b8 first back and played instead 10 ... Bf8 - e7 11 f5xe6 f7xe6 12 Lf1 - e2 Da3 - a5, but ran into a disadvantage and had to go to 64 trains give up.
In the initial position White still has the tricky train 8 a2 -a3. The farmer is now apparently " poisoned " by 8 ... Db6xb2? 9 Nc3 -a4 would already be too late to save the lady: Women's catcher. 8 ... Bc8 - d7 prepares the Poisoned Pawn.

Tempo (chess) Chess endgame Tata Steel Chess Tournament World Chess Championship 1972 Alexander Tolush Pin (chess) Sergey Karjakin Francisco Vallejo Pons Dmitry Kokarev (chess player)

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