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Chess Opening Theory/1. e4/1...c5/2. Nf3/2...d6/3. d4/3...cxd4/4. Nxd4/4...Nf6/5. Nc3/5...a6/6. Bg5/6...e6/7. f4/7...Qb6/8. Qd2/8...Qxb2/9. Rb1/9...Qa3

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< Chess Opening Theory‎ | 1. e4‎ | 1...c5‎ | 2. Nf3‎ | 2...d6‎ | 3. d4‎ | 3...cxd4‎ | 4. Nxd4‎ | 4...Nf6‎ | 5. Nc3‎ | 5...a6‎ | 6. Bg5‎ | 6...e6‎ | 7. f4‎ | 7...Qb6‎ | 8. Qd2‎ | 8...Qxb2‎ | 9. Rb1
Poisoned Pawn Variation
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black kinge8 black kingf8 black bishopg8 black kingh8 black rook8
7a7 black kingb7 black pawnc7 black kingd7 black kinge7 black kingf7 black pawng7 black pawnh7 black pawn7
6a6 black pawnb6 black kingc6 black kingd6 black pawne6 black pawnf6 black knightg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black kinge5 black kingf5 black kingg5 white bishoph5 black king5
4a4 black kingb4 black kingc4 black kingd4 white knighte4 white pawnf4 white pawng4 black kingh4 black king4
3a3 black queenb3 black kingc3 white knightd3 black kinge3 black kingf3 black kingg3 black kingh3 black king3
2a2 white pawnb2 black kingc2 white pawnd2 white queene2 black kingf2 black kingg2 white pawnh2 white pawn2
1a1 black kingb1 white rookc1 black kingd1 black kinge1 white kingf1 white bishopg1 black kingh1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w

Moves: 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

Sicilian Defence, Poisoned Pawn Variation

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This is the only move for Black's queen, and so should be self explanatory. Another move, 9...Nxe4? drops a piece not to 10.Nxe4?? Qxb1+ and Black is winning, but 10.Rxb2 Nxd2 11.Kxd2 and White is winning.

Here White has a few choices. The most popular is 10.f5, applying direct pressure to e6. Then Black usually plays 10...Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4, when Black's best is 15...Qxa2 (or 15...Be7 16.Be2 h5 17.Rf1!, with a strong attack).

White's other choices are 10.e5 and 10.Bxf6.

Theory table

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For explanation of theory tables, see theory table and for notation, see algebraic notation..

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 11 12 13 14 15 16
f5
Nc6		 fxe6
fxe6		 Nxc6
bxc6		 e5
dxe5		 Bxf6
gxf6		 Ne4
Qxa2		 Rd1
Be7		 =
Bxf6
gxf6		 Be2
Nc6		 Nxc6
bxc6		 O-O
Qa5		 Kh1
Be7		 f5
h5		 Bf3
Kf8		 =/+
e5
dxe5		 fxe5
Nfd7		 Ne4
h6		 Bh4
Qxa2		 Rd1
Qd5		 Qe3
Qxe5		 Be2
Bc5		 =

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Wikipedia has related information at Sicilian Defence, Najdorf Variation

References

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de Firmian, Nick. Modern Chess Openings, 15th Edition. New York, NY: Random House, 2008.

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