Sämisch Variation: 5.f3 is variation 4 of 6 in the Against the King's Indian and Grünfeld course, a advanced opening course for White (ECO E81). It runs 25 moves and begins 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 …. A second weapon against the King's Indian. White guards e4 with f3 and develops the bishop to e3 and the queen to d2. After ...e5 and d5, White opens the c-file and keeps a solid space edge. 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.
1... Nf6 – Black develops.
2. c4 – White gains space.
2... g6 – Black prepares the fianchetto.
3. Nc3 – White develops.
3... Bg7 – The bishop takes the long diagonal.
4. e4 – White builds the big centre.
4... d6 – The King's Indian.
5. f3 – The Sämisch. The pawn guards e4 like a rock and stops Black's pieces from using g4.
5... O-O – Black castles.
6. Be3 – The bishop develops. The queen goes to d2 next, and both look at the h6 square.
6... e5 – Black strikes at d4.
7. d5 – White closes the centre and gains space.
7... c6 – The most common move. Black wants to open the c-file.
8. Qd2 – The queen develops and supports the e3 bishop.
8... cxd5 – Black opens the c-file.
The lesson goes on for 9 more moves, each with its explanation.