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The Najdorf Variation [1] (/ ˈ n aɪ d ɔːr f / NY-dorf) of the Sicilian Defence is one of the most popular, reputable, and deeply studied of all chess openings. [ 2 ] [ 3 ] Modern Chess Openings calls it the " Cadillac " or " Rolls-Royce " of chess openings. [ 4 ]
The best known of these, called the Poisoned Pawn Variation, is a line of the Sicilian Defense, Najdorf Variation that begins with the moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6. after which 8.Qd2 Qxb2 usually follows, accepting the "poisoned" b2-pawn. White can also play 8.Nb3, protecting the pawn.
Bold type indicates that another variation is considered elsewhere – usually in another table. A hyphen (-) or en dash (–) indicates that the variation transposes to a variation elsewhere. Transpositions are common in chess – a given position can often be reached by different move orders – even move orders with more or fewer moves.
In some openings, book lines have been worked out for over 30 moves, such as some lines in the classical King's Indian Defense and in the Najdorf Variation of the Sicilian Defense. [4] Professional chess players spend years studying openings, and they continue doing so throughout their careers as opening theory continues to evolve.
The diagram shows a common opening known as the Sicilian Defense, Najdorf Variation, arising after the moves 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6. Black's fifth move is a prophylactic move that intends to prevent White from placing a knight or bishop on b5.
Amsterdam Variation of the Sicilian Defence, Najdorf Variation – 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4; Amsterdam Variation of the Sicilian Defence, Dragon Variation – 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2; Arctic Defense of the Zukertort Opening - 1.Nf3 f6
Katalymov Variation of the Sicilian Defence – 1.e4 c5 2.Nf3 b6 – named after Boris Katalymov [71] Keene Defense to the King's Gambit – 1.e4 e5 2.f4 Qh4+ 3.g3 Qe7 – named after Raymond Keene [72] Keres Attack of the Sicilian Defence – 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4 – named after Paul Keres [73]
The Sicilian Defence is a chess opening that begins with the following moves: . 1. e4 c5. The Sicilian is the most popular and best-scoring response to White's first move 1.e4. The opening 1.d4 is a statistically more successful opening for White because of the high success rate of the Sicilian defence against 1.e4.