What was white's plan with 39. h7 ?
By the way 33. fxg5 f4! and 38. Rf1Bg3 is a marvelous move. we should always have to look after these kinda in-between moves.
What do you think, does white overlooked 20. Qd1 or simple wanted to place the queen to the h5?
If she does, than 21. a4 doesnt fit in the picture.
I posted a game for us to look at and discuss as a group. Its by no means perfect, but I think it is a good example of black defending and gradually taking advantage of weaknesses in the white position. Feel free to comment or ask questions about anything. You can't get stronger if you don't ask questions