Theory
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 — that quiet-looking a6 is the whole idea of the Najdorf. It rules out Nb5 and Bb5+ ideas before Black commits the rest of the position, keeping options open for e5, e6, or a kingside fianchetto depending on how White sets up.
What makes the Najdorf B90–B99 range so heavily studied is the sheer number of critical tries White has — the English Attack with Be3 and f3, the classical Be2 lines, and sharp gambits like the Poisoned Pawn Variation all lead to genuinely different games. This isn’t a repertoire you memorise once; it’s one you build understanding for.
Model Games
Kasparov’s Najdorf games from the 1980s remain the standard reference — particularly his handling of the English Attack as Black, absorbing White’s kingside pawn storm while counterattacking on the queenside and centre. Watch specifically for the timing of b5 and Nb6.
Practice Positions
Drill the standard English Attack structure: White pawns on e4/f3, bishop on e3, about to castle queenside. Black’s task is to identify whether b5 or d5 breaks first, and why the wrong order can lose material.