King's Indian Classical: Bayonet Attack 9.b4 is variation 1 of 6 in the Against the King's Indian and Grünfeld course, a advanced opening course for White (ECO E97). It runs 25 moves and begins 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 …. White closes the centre with d5 and attacks on the queenside at once with 9.b4. Black plays ...Nh5 and ...f5 for kingside play. White's rook guards e4, the knight jumps to g5, and White gets ready for c5. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. d4 – White takes the centre and opens the c1 bishop.
1... Nf6 – Black develops and stops e4 for now.
2. c4 – White gains space and gets ready for Nc3 and e4.
2... g6 – Black prepares to fianchetto the bishop on g7.
3. Nc3 – White develops and supports the push to e4.
3... Bg7 – The bishop takes the long diagonal. It aims at d4 and the queenside.
4. e4 – White builds the big centre with pawns on c4, d4 and e4.
4... d6 – The King's Indian. Black holds back in the centre and will strike later.
5. Nf3 – The Classical. White develops calmly and keeps the centre strong.
5... O-O – Black castles.
6. Be2 – The bishop develops modestly. White gets ready to castle.
6... e5 – Black strikes at the d4 pawn.
7. O-O – White castles. The d4 pawn is guarded by the knight and the queen.
7... Nc6 – The main line. The knight attacks the d4 pawn a third time.
8. d5 – White closes the centre and chases the knight. Now White plays on the queenside.
8... Ne7 – The knight steps back to e7. It can go to the kingside later.
The lesson goes on for 9 more moves, each with its explanation.
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