Sicilian Defense: Najdorf Variation (B90)
B90 · 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6
Sicilian Defense: Najdorf Variation (B90: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6) is one of the cornerstone openings in ChessMinds Opening Codex Volume 7. 5...a6! is the ultimate multi-purpose move: it keeps White pieces out of b5, prepares ...b5 queenside expansion, and waits to see White’s setup before choosing ...e5 or ...e6.
White's Strategic Plans
- English Attack (6. Be3, f3, Qd2, O-O-O, g4): launch a direct pawn storm against Black’s kingside.
- Classical / 6. Bg5 or 6. Be2: fight for the d5 hole while maintaining central king safety.
Black's Counterplay & Breaks
- Answer 6. Be2 with 6...e5! seizing central space while accepting a backward d6-pawn and guarding d5 with pieces.
- Generate counterplay down the half-open c-file (...Qc7, ...Rc8) and with ...b5–b4 undermining White’s c3-Knight (the defender of e4).
Official Lichess ECO Sub-Variations
- B84 Sicilian Defense: Najdorf Variation, Scheveningen Variation:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Nbd7 - B90 Sicilian Defense: Najdorf Variation, Adams Attack:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 - B90 Sicilian Defense: Najdorf Variation, Dekker Gambit:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g4 - B90 Sicilian Defense: Najdorf Variation, English Attack:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 - B90 Sicilian Defense: Najdorf Variation, English Attack:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 - B90 Sicilian Defense: Najdorf Variation, English Attack:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be7 8. f3
FAQ
What are the exact moves and ECO code of Sicilian Defense: Najdorf Variation (B90)?
In the official Lichess ECO database, Sicilian Defense: Najdorf Variation carries code B90 and arises after 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6.
Is Sicilian Defense: Najdorf Variation (B90) good for club players (800–1800 Elo)?
Yes! 5...a6! is the ultimate multi-purpose move: it keeps White pieces out of b5, prepares ...b5 queenside expansion, and waits to see White’s setup before choosing ...e5 or ...e6. Lichess cloud Stockfish NNUE at depth 55 scores the main tabiya at +0.25, giving rich strategic plans for both sides.
How do I memorize Sicilian Defense: Najdorf Variation (B90) variations without forgetting moves?
Open ChessMinds -> Labs -> Opening Codex -> Volume 07. Practice Guided & Recall drills for free (0 Focus Hearts) to earn 2 Stars, then pass the 10s/move Blindfold Trial for 3 Stars.