Sicilian Defense Rauzer Attack | Tutorial by GM Marian Petrov | CHESS KLUB

White's most common reply against Najdorf is 6.Bg5, the Richter-Rauzer Attack. The move 6.Bg5 was Kurt Richter's invention, threatening to double Black's pawns after Bxf6 .
After 6...e6, Vsevolod Rauzer introduced the modern plan of Qd2 and 0-0-0 in the 1930s. White's pressure on the d6-pawn often compels Black to respond to Bxf6 with ...gxf6, rather than recapturing with a piece that also has to defend the d-pawn. This weakens Black's kingside pawn structure, but in return Black gains the two bishops and a central pawn majority.
Nowadays white goes f4 and Qf3,after this the plan is 0-0-0 followed by g4,Bf6 and g5 h4.
Black could meet f4 with Qb6, which leads to the famous poisoned pawn line, where black takes a pawn after Qb2 but is losing a lot of time with his queen.
This is the sharpest line in Sicilian with long theoretical lines.
Or he could develop with Be7 Nbd7 Qc7 and b5, then castle and start counterplay on the queenside.
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[@walterbrownstone8017]

There are many variations of the rauzer Sicilian but lichess doesn't recognize the najdorf version that you teach.