A move that deviates from the typical choice of Najdorf players, who are certainly more attracted to 6...e5 or 6...e6, but which is still perfectly possible, as is 6...g6.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. h2h3 