@photophore:

Well...it seems like white played sort of poorly here. For instance, he played b4 but never got around to playing c5, and played the Kh1/Bf2-g1-f2 trick, which looked cool when I saw Korchnoi get away with it, but always seems to get me mashed in 5 minute games. Isn't 17. c5 the normal move here? 

I checked chessbase online, I just found a game that seems very good for black after 17. c5. The game was drawn by perpetual, but I wonder if black has a cruncher:

17. c5 g4 18. c6 g3 19. hxg3 fxg3 20. Bxg3 Nh5 21. Bf2 bxc6 22. Nxc6 Qg5, and now white played 23. g4, when 23. ...Nhf4 led to a draw by perpetual. I just wonder if black has something better after 23. g4, or If white has something better than g4.

Ok, my faith in 15. Nb5 is shaken, so I look for a confidence builder. Usually this comes in the form of the question, "What would Korchnoi do in this position?" So after a search on chessbase online, I come to the realization that Korchnoi has never played 15. Nb5. That seems like trouble to me, since I'm fairly certain that at some point Korchnoi must have faced 14. ...Kh8. So I look into it: what exactly does Korchnoi play instead? Now my search brings out all the big names. 15. Nd3 is the preferred move of Korchnoi, Shirov, Nielsen, etc. Maybe 15. Nb5 is simply too dangerous?

Well when a way is decided ill have to change defence, as it wouldnt be fun to have a plan in the midst of chaos!

I was going over this variation the other day and i must say if i was white i would try everything in my power to stop a kings indian player from playing f4! They may attain counter play on the queens side but the benefit of the Kings Indian player is that he or she is attacking whites king not the king side! So in theory it wouldnt matter if white nabbed a few pawns as those are valuable tempi he shoul be using to defend! 

Am I the only KID player with this view. If  i do play the white side i play a fianchetto variation! But largely do to the study of the old soviet players not because i find it the biggest test to the KI. That i would imagine would be the averbach or samisch.

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O
6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Nd2 

An important line here.  White intends a quick queenside advance with b4, c4-c5 and then Nd2-c4, pressuring d6.  Play becomes very complex with Black usually countering with an all-out assault against White's King.

9.... a5

By playing ...a5 early, once again Black hopes to slow down White's advantage long enough to get his own act together on the Kingside.  9... c5 is not as aggressive as 9... a5.

10.a3 Nd7
11.Rb1 f5
12.b4 Kh8
13.f3 f4
14.Na4 

is a very direct way to push for c4-c5
and here  GM Nunn believes that to  deal with the off placed Na4, it is best to play

14... axb4
15.axb4  c6 !  This is also recommended by GM Gallagher.  This is an improvement over Beliavsky--Radjabov, 2002)

White's pawns on the Q side are becoming nothing.  If White captures dxc6 then Black plays Nxc6 and will head to d4 with his Knight.  If White wants to get rid of the Nd4, he will make the Bg7 very strong after Black plays ...exd4.  Black is doing well here.

and if White plays too ambitiously with 16.c5 (seeking a break-through) then


16. c5  cxd5 
17. cxd6 Nc6 
18. Nc3 Nb6 
19. Nxd5 Nxd5 
20. exd5 Nd4 
21. Ne4 Nf5 

and ...Nxd6 Black is slightly better in my opinion.  Both of Black's rooks control more space and he has two targets (d5 and b4) and if White exchanges Knights on d6 his Bc8 can go to f5 when his other rook can go to c8.  If White does not exchange Knights, Black's bishop can still go to ...f5 (or ...d7).  Black  has a good position and he no longers needs to TRY to equalize here.

There you go, Woofwoof.
P.S.  later we can discuss other lines where White is not so reckless with his pawn breaks but where Black generates action on the K-side thanks to the time  allowed by White.

@woofwoof

I will be glad to discuss this line with you should you ever wish to do so.  (...a5 )

@woofwoof,

I neglected to mention (I half-remembered it, now have looked it up to confirm) that ...d5 plus ...a6 was once the approved way for Black to play in the 10. dxc6 variation ...for example an older ECO gives it as leading to equality.  But in that case White was playing immediate Ba3 instead of a4.  So apparently that is considered a significant difference (hence the "a4!" in the newer edition).

Maybe it would be accurate to say that the general feeling developed years ago that the 9...c5 positions (without 10. dxc6) are a bit too rigid for Black, while 9...a5 is more flexible.  For example, after 9...a5 Black could (and does) later play ...c6 in certain instances, though of course his primary focus is on the kingside.

I like 9... a5 vs 9.Nd2.  I side with GM Gallagher and  I personally, feel better making it difficult for White to claim more space on  the Q side (and even challenging him ) while at the same time making my own progress on the K-side where my claim there is undisputed.