Where did I go wrong with 'Opposition'

Hi, here is game (only at the end) where I thought that I had a draw because of 'opposition' but to my suprise i lost.  Did i miss anything about opposition.  I thought that when you doing the 'opposition' draw is the result.  Is there other position where 'opposition' won't work.  Thank you for your help.

A non rook-pawn pawn on the fifth rank + king on the 6th rank is winning, regardless of whether the defender takes opposition.

In this position white to move draws and black to move wins.

But in the game positon where blacks king is in front of his pawn on the 6th, black wins regardless of who is to move.

Stockfish says that in this position, you had no chance.

http://en.wikipedia.org/wiki/King_and_pawn_versus_king_endgame#Pawns_other_than_rook_pawns

This describes the key squares for promoting a non-rook pawn.  Your opponent reached a key square for promoting his pawn, so opposition didn't matter.

Thanks for the info.  I let this position happened thinking that it was a draw.  I was shocked with the final result.  My ignorence and lack of knowledge was very obvious here.  

I just made a post, after reading this some hours ago. It is aendgame study according to your that theme:

http://www.chess.com/forum/view/endgames/knowing-the-opposition-rules-can-help

I've heard that if the king is in front of the pawn, like it was in your diagram, then it is a win.  If it is behind the pawn, then there is a chance for a draw depending on opposition.

That's simply wrong. It is only correct if the pawn is on the 6th rank. Here's an example when a king is in front of the pawn and it's a draw:

To learm more about opposition, just go to the link in post #6 by mauerblume.  He has made about 4 blogs about it & it is very informative.  

#2 says it all 

The main point is, because the pawn is only on the 5th rank, your opponent can push it to the 6th rank and thereby flip who has the opposition by not moving his king.

Yes, 10 months ago (when I posted this) diagrams included side to move, so it was clearly stipulated "white to move" on the diagram.

Thanks Jin Chan (i doubt that is even your name) for slurs towards me & my family esecially in my notes.  Don't worry, i won't ban you.  I always allow the dogs to BARK.  Please keep barking.  :)

Chess Mentor lesson on Opposition, King in front of pawn 6th rank.

About a year ago I wrote a series of 4 blog posts covering this whole ending pawn+king vs. king. In case you would like to take a look, it begins here: http://www.chess.com/blog/Shakaali/elementary-pawn-endings-i

Opposition is only significant when the kings fight about the control of certain key squares. If the attacking side already occupies a key square then opposition is totally meaningless. Key squares are the most basic concept of pawn endings, not opposition.

Thanks everybody but at the time of posting (1 & half year ago) i was puzzled.  Now i know where i went wrong & what is opposition.  Thanks a lot

For anyone trying to understand how to maintain the opposition, zugzwang, or king pawn endgames in general, I just put out an article that can help

https://www.chess.com/blog/Dumbluck626/the-path-to-victory-when-youre-a-pawn-up-calculation-part-x