opening - Why does 6.Bg5 prevent 6e5 in the Sicilian Najdorf

In Gufeld's book, after 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5!, [FEN ""] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5! he writes: "In this way White solves three

Sicilian Defense, Najdorf w/ 6.Bg5 - Standard chess #21

Sicilian Najdorf - Chess Pathways

Back To Basics Openings PDF, PDF, Chess Openings

S. Bücker & C. Galofre - Chess Cafe - Over the Horizons - 1-74, PDF, Chess Openings

Over The Horizons: Nimzowitsch and The Dutch Defense, PDF, Chess Openings

Sicilian Najdorf 6.Bg5

How to Play the Sicilian Najdorf Main Line Theory of 5a6 (B90)

Back To Basics Openings PDF, PDF, Chess Openings

Back To Basics Openings PDF, PDF, Chess Openings

What are the main ideas of the najdorf sicilian? - Quora

How to play against main line Bg5 in the Najdorf sicilian

Should I play e6 or e5 in the Najdorf Sicilian? I heard that both are playable in most cases but there are some exceptions. - Quora