6.Nf5 d5: the forward knight is variation 6 of 6 in the Sicilian Sveshnikov course, a advanced opening course for Black (ECO B33). It runs 22 moves and begins 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 …. White sends the knight to f5 instead of back. Black hits the centre at once with ...d5. After the trades on f5 and c6 Black develops fast and gains space with ...e4. Many White players go wrong on move seven. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. e4 – White takes the centre.
1... c5 – The Sicilian. Black fights for d4 from the side.
2. Nf3 – White develops and prepares to open the centre.
2... Nc6 – Black develops and watches d4.
3. d4 – White opens the centre.
3... cxd4 – Black takes and gets the half-open c-file.
4. Nxd4 – White takes back with the knight.
4... Nf6 – Black develops and attacks e4.
5. Nc3 – White defends e4.
5... e5 – The Sveshnikov. Black kicks the knight and takes space.
6. Nf5 – The knight jumps forward instead of back. It eyes d6 and g7.
6... d5 – The best answer. Black strikes in the centre while the f5 knight is loose.
7. exd5 – White takes the pawn. This is the only move that keeps the balance.
7... Bxf5 – Black takes the knight. The c6 knight is attacked, but Black does not mind.
8. dxc6 – White takes the knight.
8... bxc6 – Black takes back toward the centre. Black has a big pawn centre and quick development.
The lesson goes on for 6 more moves, each with its explanation.