Sicilian Najdorf

The Sicilian Najdorf (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6) is the most famous fighting weapon in chess — the signature opening of Fischer and Kasparov. The quiet-looking 5…a6 is anything but: it takes the b5 square away from White’s pieces and prepares …e5 and …b5, keeping every pawn structure option open while Black waits to see White’s plan.

The Najdorf is a counterattacking opening: Black concedes early space and asks White to prove something, then strikes back in the centre and on the queenside. The price is theory — this is one of the most deeply analysed openings in chess, with razor-sharp lines where both kings can come under fire. The reward is the richest, most double-edged battleground the Sicilian has to offer, played at every level from club to World Championship.

Main lines

• 6.Be3The English Attack — White castles long and storms with f3, g4, h4; Black counters with …e5 or …e6 and a queenside race.
• 6.Bg5The classical main line — the sharpest try; after …e6 7.f4 it can lead to the famous Poisoned Pawn with …Qb6.
• 6.Be2The Opocensky — a calmer setup; Black gets the thematic …e5 with comfortable, flexible play.
• 6.Bc4The Fischer–Sozin Attack — White eyes f7; Black blunts the bishop with …e6 and queenside play.

Key plans & ideas

• The …e5 break: hit the d4 knight and grab central space, accepting the d5 hole in return for activity (typical against 6.Be2 and 6.Be3).
• Queenside expansion: …b5, …Bb7 and …Nbd7 aim play at White’s queenside and the e4 pawn.
• Use the half-open c-file: …Rc8 and queenside pressure are Black’s natural inheritance from the Sicilian.
• The thematic exchange sacrifice …Rxc3: wreck White’s queenside structure to expose the king and seize dark squares.
• In opposite-side castling races, speed beats material — push your pawns at the enemy king and count tempi, not pawns.

Frequently asked questions