[Event "♣ Sicilian Defence - Variations and Theory♣: Sicilian Defence-Najdorf Variation"]
[Site "https://lichess.org/study/NaoiObC1"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[Annotator "https://lichess.org/@/Eligora"]
[ECO "B97"]
[Opening "Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted"]
[UTCDate "2018.01.31"]
[UTCTime "18:55:39"]
[Variant "Standard"]

{ The Najdorf is one of the most popular openings in chess. It is used by all levels of chess player. } 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 { Some potential moves after this are 6.Bg5, 6. Be3, Be2, Bc4, f4, h3, or g3. [%csl Ge6,Gd7,Gb5,Gb7,Gb4,Gd5][%cal Ge7e6,Gb8d7,Gb7b5,Gc8b7,Gb5b4,Gd6d5,Gf2f3,Gd1d2,Ge1c1,Ga1d1,Gc1g5] } 6. Bg5 { From Black's perspective, these pawn attacks from the a6 pawn and the d6 pawn can be very useful, as they help to control the fifth rank. } ( 6. Be3 { This is the English Attack. White is taking a more passive approach, just aiming to get the pieces out and castle. } 6... e6 7. Qd2 Nbd7 8. O-O-O b5 9. f3 Bb7 10. Kb1 b4 11. Na4 d5 { Black is fighting for control over the center but white argues that he has a lead in
development. } ) ( 6. Be2 { This is the Opocensky Variation. White is just getting the pieces out before castling and figuring out a middlegame plan. } ) ( 6. Bc4 { The Lipnitsky Attack, in which White aims to put pressure on the f7 square. Black can easily block with 6...e6, though. } ) ( 6. g3 { The Zagreb (Fianchetto) Variation. Black often plays e5, e6, or mirrors White with g6. White then fianchettos the Bishop. } ) ( 6. f4 { This is the Amsterdam Variation. White begins to take control over more of the fifth rank. [%csl Gg5,Ge5][%cal Gf4g5,Gf4e5] } ) ( 6. h3 { This is the Adams Attack. } ) ( 6. Rg1 { This is the Freak Attack. White is preparing to play g4 at some point, like in the Keres Attack. If Black plays Nxg4, then White can proceed with Rxg4 followed by Bxg4 Qxg4, and White is a Pawn up.
The following line is just an example of what could happen if Black doesn't spot this. [%csl Gg4][%cal Gg2g4] } 6... g6 7. g4 Nxg4 8. Rxg4 Bxg4 9. Qxg4 ) 6... e6 7. f4 Qb6 { The Poisoned Pawn Variation. [%csl Rb2][%cal Rb6b2] } ( 7... b5 { The Polugaevsky Variation. Black is beginning to advance the pawns on the a and b files, which not only have the best chance of promoting but can begin to put pressure on White's Queenside. } 8. e5 dxe5 9. fxe5 Qc7 10. Qe2 { The Simagin Line. It would probably been slightly better for White to take the Knight on f6 but either is good. } ) ( 7... Be7 8. Qf3 h6 9. Bh4 Qc7 { The mainline here shows the Browne Variation, in which both sides have developed some pieces and are in good position for the middlegame. [%csl Gc1][%cal Ge1c1] } ( 9... g5 { The Goteborg (Argentine) Variation. Black is determined to kick the White Bishop back into its own territory. Normally the line continues as follows. } 10. fxg5 Nfd7 ) 10. O-O-O Nbd7 11. Be2 b5 12. a3 Bb7 13. Qg3 O-O 14. Bf3 Nc5 15. Rhe1 Rac8 16. Kb1 Na4 17. Nxa4 bxa4 18. c3 Rb8 19. Ka1 Qb6 20. Rd2 Bd8 21. Kb1 a5 22. e5 dxe5 23. Rxe5 Nd5 24. Bxd8 Rfxd8 25. Ka1 Ne7 26. Bxb7 Rxb7 27. Qf2 Nd5 28. f5 Nxc3 29. fxe6 fxe6 30. Re1 e5 31. Nc6 Qxf2 32. Rxf2 Rd1+ 33. Rxd1 Nxd1 34. Rd2 Ne3 35. Re2 Nc4 36. Rc2 Ne3 37. Re2 Nc4 ) 8. Qd2 Qxb2 9. Rb1 Qa3 *