Levenfish 6.f4 is variation 4 of 4 in the Sicilian Dragon course, a advanced opening course for Black (ECO B71). It runs 24 moves and begins 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 …. White plays f4 to push e5 at once. The safest answer is 6...Nc6, trading knights and meeting e5 with ...Nd7. Black gets a sound structure and active pieces after ...d5. 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.
2. Nf3 – Develops.
2... d6 – Controls e5.
3. d4 – Opens the centre.
3... cxd4 – Takes a centre pawn.
4. Nxd4 – Recaptures.
4... Nf6 – Hits e4.
5. Nc3 – Defends e4.
5... g6 – The Dragon fianchetto.
6. f4 – The Levenfish: White prepares e5 to chase the f6 knight before Black has castled.
6... Nc6 – Develops and offers a knight trade so e5 will not come with too much force.
7. Nxc6 – White trades knights so that e5 comes with more force.
7... bxc6 – Recaptures toward the centre; the b-file opens for Black's rook.
8. e5 – White pushes, attacking the f6 knight.
8... Nd7 – The knight retreats to d7, where it can come back via c5 or f6.
The lesson goes on for 8 more moves, each with its explanation.
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