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: Open, Najdorf Variation - Chess Openings

Review: The Sicilian Najdorf 6 Bg5

What do people play against your Sicilian Najdorf in classical OTB games? - Quora

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

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

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

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Sicilian Najdorf 6.Bg5

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

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

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