Papageno wrote on 12/17/08 at 18:04:27:
Just browsing through Cox: Berlin Wall, I realize that he deals with lots of 9th move alternative for Black, just to mention 9...Ne7 (with and without Ng6 in the next move) , 9...Bd7, 9...Be7 and 9...Ke8 (followed by a7-a5-a4!?). Even 9...Be6 is dealt with, amongst the more dubious continuations
However, 9... h6 seems not to be discussed at all, as far as I unterstand. Nor is explained why this move is irrelevant... After all, 9...h6 is among the most popular moves in the position. (In fact, it is the move I have seen most often, when I play the Berlin with the white pieces.) Admittedly, there are a few remarks by Cox scattered over the book: On the side, the move ...h6 is often played soon and quite useful. On the other side, he remarks that late Tony Miles almost never employed it, seeing it as a loss of tempo. Black might need to play h5-h7 in one move, etc.
So, what's the current verdict on this move 9...h6? Which reason (or maybe a concrete line) put it out of use? Did perhaps Khalifman refute it?
IMHO, Black could well consider playing 9...h6 10.h3 and then continue with his usual plans like 10... Bd7 or Ne7 or even 10... Be6. Any opinions?
(Edit: It's all about 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3)
Speaking strictly as a player of the 9...Bd7 line, I would say that you have answered your own question, at least in that line. If Black plays ...h6 before White plays h3, then Blask often has wasted a tempo, since he may have to play ...h5 to slow down the h3/g4/f4-f5 steamroller.
Larry Kaufman's book on "The Chess Advantage in Black and White" deals a bit with this ...h6 issue.