Beating Consistent Kings Indian Defence Player

Has anyone got any opening ideas to exploit a player that will always open with the kings indian defence (as black), regardless of what white plays?

(we're both very average players, around 1200)

Id say go for the Bayonet, but that is just me

Try reading "The Mammoth Book of Chess". The author, Graham Burgess, really likes this opening and has a lot to say about it.

1. e4.

Ah, I see you play 1. d4. Play whatever you enjoy then. Look at several different lines you could try and find one you enjoy. It seems you like a Stonewall setup, so you could try this against the KID.

Anyway, the opening is not going to decide your game. At your level just follow normal opening principles. Mainly focus on not losing pieces, keeping an eye out for tactics, and follow general chess principles.

Here's some opening principles: http://exeterchessclub.org.uk/content/ten-rules-opening

As you are 1200 learning a complex kingindian setup to beat your opponent is probably not going to help you very much. In general one of you will drop a piece or make a very big positional mistake and lose. 

However:

A stonewall with f4 against the king indian setup is a rather bad idea as there is no convinient way for white to block e5 giving black easy eqyality.

There are a few principaled ways to fight the KID. 

1) The mainline systems (mar del plata etc) leading to very complex play with a black kingsite attack and a white queenside attack. Theoretically speaking this is probably the best line if you are looking for an opening advantage (even tough smal). 

2) Systems with g3. These systems are more about positional understanding and pressure. They are easy to play but hard to master. Good thing is that black cannot play his normal kingside attack although you must know how to react if he does. 

3) Perhaps the easiest for you is the Saemisch setup (with an early f3) the basic idea is the castle queenside and play with Be3/Qd2 and open the h4 with h4-h5. Even though with perfect black play he can probably equalize the black defensive and counter attacking plans are much harder then whites simple and direct attack scheme giving you an advantage in strategic plans. You only have to make sure you do not drop pieces :)

If he blindly plays d6 and e5 against anything, then I'd recommend Ben Finegold's line with Nf3, Nc3, Bf4 and e3. You then play h3 to give your bishop a hiding hold on h2 and your idea is b4-c5 to break black's pawn structure. It is a very strong idea and almost refutes the e5 line- but alas if black knows the Bf4 variation, he won't play e5 but rather c5 which equalizes easily...

one option is to take the opportunity to have a good go at learning the kings indian, which as a d4 player will come up a lot. good luck with your chess.

I've played this kind of thing since I started, and my record against the KID is quite good:

I'm definitely not saying that this is the best line for either color, and you may notice that I'm blatantly violating opening principles, but here's the idea: You want to play Qd2 (so that you can simply take the h pawn if your opponent tries to kick out the bishop), castle queenside, get Bd3 and Ne2 in as quickly as possible, and then start running all of your kingside pawns up the board. Chances are, black will begin attacking you on the queenside, but you've got more space, and, if you played an early h4, a head start. Usually, I'm not a proponent of hack attacks, but the KID concedes so much space that I feel like it's just *wrong*, so I try to prove it wrong by sucking up all of the available squares and getting checkmate.