Sveshnikov: 7.Bg5 and 9.Nd5 is variation 5 of 6 in the The Open Sicilian for White course, a advanced opening course for White (ECO B33). It runs 29 moves and begins 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 …. Against the Sveshnikov White fights for d5. The bishop trades off the f6 knight. The a3 knight comes back through c2, and White opens the a-file. 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 and frees the queen and the f1 bishop.
1... c5 – The Sicilian. Black fights for d4 from the side and keeps the game unbalanced.
2. Nf3 – The knight develops and prepares d4. This is the road to the Open Sicilian.
2... Nc6 – Black develops the knight and fights for d4.
3. d4 – The Open Sicilian. White opens the centre at once to use the lead in development.
3... cxd4 – Black takes. Black gives a wing pawn for a centre pawn and gets the half-open c-file.
4. Nxd4 – White takes back and gets a strong knight in the centre.
4... Nf6 – Black develops and attacks e4.
5. Nc3 – The simplest answer. The knight guards e4 and develops.
5... e5 – The Sveshnikov. Black kicks the knight and grabs space. The d5 square and the d6 pawn become weak.
6. Ndb5 – The knight jumps to b5. It eyes the d6 square.
6... d6 – The only good way to stop the knight check on d6.
7. Bg5 – The bishop hits the f6 knight, which guards d5.
7... a6 – Black kicks the b5 knight.
8. Na3 – The knight retreats to a3. It looks offside, but it comes back through c2 or c4.
8... b5 – Black takes the c4 square away from the knight.
The lesson goes on for 13 more moves, each with its explanation.