tpstar: "Here are a few key variations:
a) 14. Bxa4 Bxa4 15. Bxh6 wins a pawn because of the discovered attack on the black queen. However after something like 15 ... Nd5 16. Bg5 Qb6 Black has excellent attacking chances against the white king.
b) 14. Bxh6 at once is also playable because after 14 ... gxh6 15. Bxa4 Black cannot recapture because of the pin on the d-file. Instead, he should counter-sacrifice with 14 ... Nxb2!
c) On 14. Ne5 Black has a choice between the complications of 14 ... Nxb2!? or simplifying with 14 ... Bxb5 15. Qxb5 Qe8! The latter position is about equal."
"And why not the obvious 15. Bxh6 here? Well, Black just calmly moves his queen (15 ... Qc7 or 15 ... Qc6) and then starts to create threats on the queenside. The white king does not have much protection. Georgiev prefers to get his kingside pieces out rather than wasting time taking a pawn but he ends up facing an attack without anything to show for it. 15. Ne5 Qc7 16. Nd3 is a better way to try and shore up his defences."
Joe Gallagher, "Starting Out: The Caro-Kann." Everyman Chess, London, 2002.