6.Bg5 main line is variation 2 of 5 in the Sicilian Najdorf course, a advanced opening course for Black (ECO B99). It runs 26 moves and begins 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 …. White pins the f6 knight, plays f4, Qf3 and O-O-O, and then pushes g4-g5 and f5. Black develops solidly with ...e6, ...Be7, ...Qc7 and ...Nbd7 and counterattacks with ...b5. The position is sharp and very well tested. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. e4 – Takes the centre.
1... c5 – The Sicilian, fighting for d4.
2. Nf3 – Develops and prepares d4.
2... d6 – Controls e5 and frees the c8 bishop.
3. d4 – Opens the centre.
3... cxd4 – Trades a wing pawn for a centre pawn.
4. Nxd4 – Recaptures with a central knight.
4... Nf6 – Attacks e4, forcing White to defend it.
5. Nc3 – Defends e4 and develops.
5... a6 – The Najdorf: takes b5 away from White and prepares ...e6 or ...e5.
6. Bg5 – Pins the f6 knight against the queen and prepares f4 and Qf3 with a quick attack.
6... e6 – Breaks the pin's effect by preparing ...Be7, and keeps d5 and f5 under control.
7. f4 – Prepares e5 or f5 and gives the queen the f3 square.
7... Be7 – Unpins the knight and gets ready to castle; this is the classical main line.
8. Qf3 – The queen supports e4 and g4, and White prepares O-O-O.
8... Qc7 – Puts the queen on the c-file, controls e5 and prepares ...Nbd7 and ...b5.
The lesson goes on for 10 more moves, each with its explanation.
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