Doubling pawns on the c file in King's Indian Usually King's Indian players don't seem to be afraid to double the pawns on the c file if that means trading a knight for the dark-squared bishop. I was just wondering what are the plans that Black has in mind when doubling those pawns? For instance, if White castles queenside, how can Black use that pawn structure to its advantage?



      [FEN ""]
      [StartPly "11"]

      1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 { E73 King's Indian Defense: Averbakh Variation, Modern Defense } 7. Qd2 e5 8. Nf3 Qe8 9. d5 Nc5 10. Qc2 h6 11. Be3 Ng4 12. Bxc5 dxc5 13. h3 Nf6 14. O-O-O
In that line you posted I'd imagine black would ideally try to blockade d6 with a piece, say via Ne8-Nd6, then begin pawn storming the queenside with a6-b5, or Rb8-b5, or something along those lines. The actual attack itself would be complex, whether to push c4 or b4 first for example, and may need additional piece development to prepare it, as well as accurate calculation to prevent white from being able to blockade the pawn storm. 

As far as white attacking on the kingside, it's not so easy to attack into a fianchetto and would likely require a piece sac to break through. 

I don't know the variation in question but that's how I'd play it.