Take a look how I lost a perfect game. :(

Your stupidity -- if I can even call it that -- pales in comparison to mine.  One would need to work long and hard, and subject oneself to years of coaching in the fine art of stupidity, to even enter the same arena that I was in a month or so back in one of my games.  I had my queen in front of my king to block a check from the opposing queen.  My esteemed opponent decided to trade queens, so with his queen he took mine.  Of course the two seconds it takes you to read what happened next belies the time delay between consecutive moves that characterize computer chess, and in my case this delay was fatal.  When I returned to the game, my memory wiped clean, I saw the opponent queen on top of my king, assumed that it was protected (it was in fact not), and moved to king away.  Can anybody top that piece of brilliance?

Wow now I don't feel as bad... Yeah one thing I have to learn is to see the whole chessboard...

true 16...Nc3 is better than 16...Qb4 but doesn't win the R(d1) unless White plays 17 Kb2 so Black can capture with check because Black has to save his Q from the b3-pawn.

Yes, move 16. ... Qb4 was a mistake. But so were moves 18, 19, 20, 21, and 22. Even after dropping the knight and trading queens you still had more material than your opponent. But instead of putting your pieces into action you decide to give away all the pawns that shelter your king.

Yeah I see it.  Any ideas how I should of have played after 16. b3?

 

EDIT: Thanks Loomis.  I didn't see your post until after, my response. (It clearly demonstrates I have much to learn. :( ) 

Disclaimer: I am not good at chess. Take everything I say with a grain of salt.

AFter 17. Kxa2, I personally would have pushed the queenside rook's pawn from a4 to a5. The reason I say this is because White doesn't really have much going for him/her in terms of direct attack - if you protect your queen, White can only attack next turn with e5-e6. All of White's other material is hindered by White pawns, so I still think you have a tempo.

 Although now that I look at it, that might not save you in the end....but it seems like a good move for the time being.