I'm not sure if it's safe, but 15...Nf5 could be worth a shot.

Thank you for your comments! I had concerns regarding 15. ... Nf5, specifically: 16. Ne5 followed by 17. g4 -- could the knight retreat then or be left for the g pawn to capture?

16. hxg6 fxg6 Ne5! is down right scary for black. As ugly as it looks 15. ...g5 is blacks only hope.

Fortunately, White has obliged you by locking up his dark-squared bishop.

White's dark-squared bishop isn't doing much, but neither are half of Black's pieces! At this point White does have an attack, if not an ideal one. Black has no attack whatsoever!!

17. ...Ne4 attacking f2 would have been slightly more active

...and after 18. f3? Maybe 18. ... Ng3?

Rh3-g3 looks like a good plan as well - how would Black answer to the threat on g6 then?

Nervously!   I was actually expecting to see either that or some more aggressive moves with the kingside pawns. If White's rook came to g3, I think I would have responded with Kh7, Rg8 or Bf7, Qe8 assuming I anticipated the move in time.

...Nf5 would be pretty strong for Black.

18. g4 Nd7 19. cxb6 cxb6 20. f4 Rh8 21. Qh2 Nxe5 22. dxe5 Nc6 23. f5 the way through to black's heart.

Are we looking at the same game here? White has a few pieces pointed at the Black king, yes, but half his pieces are doing nothing (White's fault for sealing up his bishop, again).

At this juncture, White has various options that were never pursued, such as 20. Rh3, 21. Rah1 or 20. Be1, 21. Bh4 which would have very effectively brought his dark squared bishop back into play.

you can not fault white for not seeing 19. g4!! Nd7 20. Nxd7 Bxd7 21. Qh2 Rh8 22. Qe5+

!! excellent move

As often is the case white moves the piece when he does not have too. 21. ...Ra3 is actually a big waste of time since white is not obliged to defend the bishop since it is already defended well enough. Instead white should continue with his kingside opperation with 22.g4 but it is obvious that white can not see his winning advantage on the kingside.

It is only white's response that validates the move, but having played tag1153 in a couple of previous games, I was certain he would attack the rook with his bishop!

Kasparov said in this book "That is why are humans better than computers. They are would never go for material disadvantage." Great move by black, a few people would seen this combination.

what the - where in blazes did this attack come from ?!?!