1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.
Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. Bb3 Rc8 11.
O-O-O Ne5 12. Kb1 a6 13. h4 h5 14. g4 hxg4 15. h5 Nxh5 16. Rdg1 gives white a powerfull attack. Whites score has been high at elite level and there are even better improvments for white (in many games black has improvments in the actual continuesons), see for example Khalifmans Opening for White according to Anand anti Dragon book.

It appears that Carlsen preferces Chinese to avoid this, the only quesiton is what he preferces after 10 Bb3 since it rules out chinese...

Topalov-Carlsen Rc5 then f4 is strong with idea of f5 Bh6.

i have always met 12.a6 with 13.h4 h5 14.Nd5! a suggestion of chris's which seems to give white an advantage because now 14...Nxd5 15.Bxd5 Nc4?! 16.Bxc4 Rxc4 17.g4! and black has no Ra4 because of 12.Kb1
i have 85% win rate with this
14.g4 is very sharp and complicated but in my opinion not as critical as some other moves

What is the problem with meeting 14.g4 hxg4 15.h5 Nxh5 16.Rdg1
with 16...Qa5 just like in the variations without Kb1 and a6 thrown in. Rogozenko suggests this.
Presumably the main objection was losing the e7 pawn from Nd5 but this shouldnt matter because white has already dumped 2 pawns on the kingside.

16...Qa5 17.Bh6 Bf6 and black is ok despite the double exchange sac that occurs after 18.fxg4 Bxg4 19.Bxf8 Kxf8  and then Rxc3 is coming

As white i actually find it difficult to construct a plan in these kinds of position.

Anyone want to suggest a defence for black after 14.Nd5! which is looking rather dangerous in my opinion?
for that matter is anyone interested in a 12.Kb1 a6 correspondence game?

           

Some detailed analysis of what he, Dennis Monokroussos, thinks about Khalifman's analysis in "According Anand 11" can be found at his blog http://chessmind.powerblogs.com/ (posted 2009-Mar-19). One of the lines he is examining is 12. Kb1 a6 13. h4 h5 14. g4 hxg4 15. h5 Nxh5 16. Rdg1, see the game labelled "Khalifman - Carlsen Dragon".

I still think 16.Rdg1 Qa5 is the way to go.

16.Rdg1 Qa5 17.Bh6 Bf6 18.fxg4 Nxg4     Why is this verbatim?
I got an excellent double exchange sac against my computer but to be fair whites play can almost certainly be improved

18...Nxg4 19.Bxf8 Kxf8 20.Be6 Bxe6 21.Nxe6 fxe6 22.Rxg4 Rxc3! 23.bxc3 Bxc3 24.Qe3 Nf6 25.Rxg6 Qb4+ 26. Kc1 Nxe4  and according to fritz black has the advantage.

Presumably the exchange on f8 must not be accepted which leaves 19.Nf5 as the only realistic option, other moves meet with common sense replies.
the first thing to establish is 19...gxf5? 20.Rxh5 +-

19...Bxf5 20.exf5 Qxf5 is unclear. Candidats include 21.Qe2, 21.Nd5 and 21.Bxf8 which can now be followed up with 22.Nd5 avoiding Rxc3

ArKheiN wrote on 04/25/10 at 22:37:22:


[Event "Blitz:1'+3""]
[Site "Eskilstuna"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "Rybka 3 32-bit"]
[Result "*"]
[PlyCount "56"]
[TimeControl "60+3"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.
Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. Bb3 Rc8 11.
O-O-O Ne5 12. Kb1 Re8 13. h4 h5 14. Bh6 (14. g4 {
is more dangerous especielly after a recent Polgar game}) 14... Nc4 15. Bxc4
Rxc4 16. Bxg7 Kxg7 17. g4 {is Khalifmans recommendation but} (17. Nd5 {
was recommended by de la Villa in Dismatling the sicilian} e5 18. Nxf6 Qxf6 19.
Nb3 Rec8 {is best move, played in for exampel Leko-Carlsen} 20. Qxd6 Be6 21. c3
b5 {Khaflifman stops here called it unclear} 22. Rd2 {is commenly given as an improvment and is given as best by de la Villa}
R4c6 23. Qd3 Qf4 $13 {see http://openingtheory.wordpress.com/ and go to
annotated games and select Ruggeri-Lilleoren}) 17... hxg4 18. h5 Rh8 19. hxg6
fxg6 20. f4 Rxh1 21. Rxh1 Kf7 {
white ahs nothing in this position. Khalifman recommended} 22. Qd3 Rc5 23. e5
dxe5 24. Nb3 {and here I propose the unmention move} Rxc3 (24... Rc8 {
is Rybkas suggestion and Khalifman gives} 25. fxe5 Bc6 26. Rf1 Qxd3 27. cxd3
Rd8 (27... Rh8 {and Rybka thinks black is better}) 28. exf6 exf6 29. d4 {
Khalifman think white is better bacouse of the extra piece while Rykba think
is completly equal.}) 25. Qxc3 Bc6 26. Rf1 exf4 27. Rxf4 Qd1+ 28. Nc1 g5 {
in this positon only black can win} *

I have done a bit of analysis, I am not sure that Polgar's Rdg8 is better than the immediate Bh6, because of Qa5 as you mentionned somewhere. On 16.Bh6, I don't see any easy way for Black to equalize. But nowhere I have found analysis of 16..Bf6!? This move has been played 4 times in chesslive database, and Black scored 0,5/4 but Black's play may have somes improvments. White's best way to play here is not so obvious, and the computer gives something like 0.00 in many lines. At the moment I have played human moves with sacrifices where computer finally find an advantage to White but I am not sure if this is sufficient to win. Do you have analysed that move before? I may post my own analysis later.