Yugoslav Attack 9.O-O-O d5 is variation 2 of 4 in the Sicilian Dragon course, a advanced opening course for Black (ECO B76). It runs 26 moves and begins 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 …. If White castles long before playing Bc4, Black strikes in the centre with 9...d5!, opening the long diagonal. After the exchanges on d5 and c6, Black gets active pieces and good play against White's king. In the lesson every move is explained on a board and then drilled; it is free.
The lesson goes on for 10 more moves, each with its explanation.