King's Indian Defense: Sämisch Variation
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3
The Saemisch response to the King's Indian - developed by Fritz Saemisch - anchors the e4 pawn solidly while also preventing ...Ng4 as a response to Be3. The future play may involve a wild game with opposite-side castling, or an attempt by White to slowly squeeze Black using his space advantage.
Pros:
- Provides a strong pawn center
- Allows Be3 without the response ...Ng4
- Supports a pawn storm on the kingside
Cons:
- Blocks the knight's natural square, f3
- Weakens the h4-e1 diagonal
- Slightly weakens the dark-squares