Know The Opening: The Najdorf: Episode 5
As we wrap up The Najdorf we'll take a look at two different variations, but before we do let's look at our key concepts once again and we'll easily notice the similarities throughout all the variations.
Key Concepts for 6. Be2

6. Bg5

The following game seems to be a blitz game considering the some of the later moves but it is very instructive on keeping your cool, developing and advancing on the queen side.
Conclusions
The Najdorf offers Black winning chances in each variation. If your style of play is that of a fighter, you enjoy sharp lines and aren't looking for a draw with the Black pieces then The Najdorf should most definitely be on your short list.
The systems key concepts are practically universal across variations (not including 6. Bg5) which makes it even more attractive in my eyes. Control the d5 square, generate counter play on the queen side and the two pawn breaks are seen over and over again throughout variations.