Besides Qd4+, which loses a piece to Qxd4 followed by Nd2+, 26.Qe1 is the only queen move to defend against Ng3#. The imminent crisis, however, still comes after 26...Rd6! (threatening Nd2+) 27.Bd3 (27.Rd1 Ng3+ 28.Qxg3 Rxd1+ and mate) 27...Nf6! 28.Qd2/d1 Re3, or 28.Be2 Rde6.

This is the second time Anand faced Kasparov's Dragon in the match. He lost the first game when he played 30. Nb6??

12. Nxc6 is rarely used, but playable. Although I'm sure Kasparov prepped for it, the decision to make that move must have come as a surprise to Kasparov. When it has been played, it is most often played after Black's b5 pawn thrust. That way, White avoids opening up the b-file after bxc6. If White hasn't played h4 already, White usually castles king side. Otherwise, 0-0-0 is generally played.

14. Bc4 is probably the best move for White. 14. Bxg7 Kxg7 probably transposes, though it does give White the option of playing 15. Qd3 as an alternative to Bc4.

I like Black's 14. ... Qb6 over Rb8. Its subtle in that it plays on the fact that White has not castled. Black will gain a tempo if he can play c4 and White has castled king side and, if has played 0-0-0, c4 will directly attack White's queen side.

Since White hasn't castled, Black keeps up the pressure forcing White to deal with threats. Considering White's bishop is effectively pinned, he is forced to retake with 18. exd5.

18. ... e5 pressuring White again. Also playable was e6. All White needed to do was castle (I prefer 0-0) and the position is roughly equal, but instead plays 19. dxe6?

19. ... d5 20. e7 Rfe8 21. Bxd5 Rxe7+ 22. Kf1 Rd8 23. c4 Nxd5 24. cxd5 Red7 leaves White with a difficult and probably losing position.