how to play against kings indian defense?

how to attack when someone plays kings indian defense?

0-0-0, and pawnstorm their castleeeee :D

(take whatever I say with a grain of salt, I'm just an amateur)

Play on the queenside and smash him there 

thnx SpiritLancer

thnx Trapper4

A good answer depends on both your skill level and playing style.  I personally like to either restrict an ...e5 advance, make sure the traditionally weak c5 square is under wraps (a black knight there can be quite powerful), and see what chances I can build up on the queenside while watching the kingside. 

You have the Mar Del Plata Variation, Fianchetto Variation, and the KID setup against stuff like the Torre Attack.  you basically want to open up some files on the queenside and play to restrict black's counterplay there.

The king's indian is a boring defence and is very difficult to attack. All the centre is blocked up and the pieces and pawns are blocked up. How it could ever get the reputation of being a gung-ho system is beyond me. 

a good answer thnx.. @TheGreatOogieBoogie

Close the position as best you can and play on the white squares. Then force a dsb exchange. I think the Dsb in the kings indian is worth a rook, pawn and the opening of the G or H file. 

The DSB is blacks worst piece..white has a much better DSB.

Play the exchange variation. That'll shut 'em up.

Well even top level players had problems answering your question. Because you just put a very general question. 

The easiest way to to read a book on the opening to know the thematic attack, general strategy, pawn structures etc.

Make sure that you had few illustrated games on the opening to see how masters played those openings. If you have computer, see the openings tree and when confuse ask the engine for advice. Play few games with it and learn.

as someone who plays the KID, the Saemisch was the line I hated the most to see, so much that I've switched to playing 1. d4 d6 and waiting until White plays Nf3..otherwise I'll play Old Indian.

Next in line would be the fianchetto variation, but I somewhat enjoy playing against it even if it results in some horrible games for me at times.