In the early days of 6.h3, the knight used to almost always return to e2, justifying a plan with g4 followed by Ng3. As time passed and theory developed, White decided to try an alternative plan, which is what we will see in this game.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. h2h3 One of the options with the best reputation against the Najdorf. 6... e7e5 Najdorf players have the old dilemma of whether to advance the pawn to e5, as Fischer liked, or to e6, as Kasparov prefered. If you like more alternative paths it's possible to play the \"Dragondorf\" with 6...g6, the classic 6...Nc6, or even 6...b5.