1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. c1g5 Once 6.Bg5 had the undisputed status of being the main line against the Najdorf Variation. This predilection is now shared with the English Attack, starting with 6.Be3. But the old move remains one of the most dangerous weapons at White's disposal. If you're going to play the Najdorf as Black, it's good to start your studies here: in these lines, one careless move is fatal.