White to play and win

I was going over an old game of mine today and found the most frustrating blunder.

White to play




I'll allow a few people to post their thoughts on white's best move before i continue with the rest of the story.

Bd3 and the queen falls.

Bd3. no player can miss that...

now there are few posts.

I third that emotion! That move should easily lead to a crushing victory for White.

Black replied Nc5!







Can i still win the queen?











For the record i took the knight allowing the queen to get away.

well Nc5 was a good try. but after simple dxc5 (or Bc2 Nb3+ etc which also wins for white) its over. white has easy win.