Najdorf Variation, Adams Attack

The Adams Attack, 6. h3, is named after Weaver Adams. Bobby Fischer played it on several occasions. The pawn move takes control of g4 and prepares g2-g4, which gains kingside space and sets up a later pawn storm. White keeps the choice of bishop development and castling side open. If Black stops the advance with ...h5, White usually changes course with g3 and Bg2, using the fianchettoed bishop to fight for d5.

Black's most frequent answer by a wide margin is 6...e5. It accepts the hole on d5 in return for driving the knight from the center, and White has scored well in that line. The second choice is 6...e6, which leads toward a Scheveningen-type structure and has given Black better results in the Lichess database. 6...g6 is a less common alternative that fianchettoes the king's bishop. The engine rates the position as roughly balanced and lists ...Nc6 alongside the two main e-pawn moves. The Adams Attack is played less often than 6. Bg5 or 6. Be3, although the engine ranks 6. h3 among White's best sixth moves.