I always liked the Dutch although I haven't played it or its compliment, the Bird's, for years.  As you are clearly familiar, where do you feel white went wrong?  To me, 10 Nh4 is a little weak but may be book, and his latter (and somewhat as a consequence of his 10 Nh4) trading his white square bishop for your knight were his major faults.  You did take him apart well.

I think that it's a draw if white doesn't play 30.Nf5. My attack was based on that blunder.

I am not so sure.  It seems to me that you are threatening 30...Rg3.  You are exposed enought so you must be careful, but protecting his f3 pawn is a major liability for him.  you simply retain the manuverability.

Thungerstorm here, must shut down.

That game ended on the first blunder.

I started studying the Leningrad Dutch in recent weeks as my new response to 1. d4. ...f5 on the first move isn't nearly as weak as it first seems. The Dutch statistically favors white marginally in the W/L column, but also gives black very good draw odds. White blundered horrendously to let his position be blown apart in this game.