Originally posted by Positional Player
In the King's Indian Attack, after the sequence 1.Nf3 d5 2.g3 c5 3.Bg2 Nc6 4.0-0 e5
[fen]r1bqkbnr/pp3ppp/2n5/2ppp3/8/5NP1/PPPPPPBP/RNBQ1RK1 w kq e6 0 5[/fen]
How should White proceed? Outline any plans or variations you know of or can think of.
First you need to play d3 to preclude black's troublesome e4 push.
After that, there are several plans you could employ. One, which I generally use when play KID, is to play Nbd2, and e4. If he advances to d4, then you can play Nc4 to pressure the e5 pawn. Lastly, move your king's knight to make way for an f4 push. There are several recurring tactics along the way that you'll discover.
Another, the main line is to play e4 right away. Although this seems to lose a pawn if black were to meet your 5. d3 with 5... Nf6, it doesn't. If 5. d3 Nf6 6. e4 dxe4 7. dxe4 Nxe4, then 8. Nxe5 gets back the pawn. So the main line is 5. d3 Nf6 6. e4 Be7 7. Nc3 d4 8. Ne2. After this, the plans are essentially the same, but the queen's knight is on a different square.