I played the below inserted position in the otb club  tournament. I have just played Qxc7 and my opponent "punished" my move with playing be5 my position looks bad and we both agreed that my move Qxc7 was a very huge blunder.

if no computer was used to analyze I would still think that it was a big blunder.

How many of you would be able to see the saving move in the heat of the battle? I think the saving move deserves an exclamationmark.  I think only very tactical sharp people will find it.

I played Qc5 in the game and managed later to get a draw anyway because my opponent also blundered. try to find the saving....

It's a pitty that you didn't set up the position as a puzzle.
My solution is in white but when you select it you can read it: Nf6+

 I'll try to learn to do that and do that in the future. but your solution Nf6 isn't the saving move. the saving move will get you a score of -0.20 in a computer which is more or less a draw.

Nf6+ is -2.99. Black can simply take the knight and white can take a pawn.

the move I played Qc5 scores -2.61.

even though I did not make it into a puzzle, everyone can learn something from trying to find the best move without a computer. if you want the solution I write it in white the move and the variation here : bf4!  bxc7 Nf6+ kh8 nxh5 bxf5

Good post:))Hard to find, but sweet when you do:)

Draw?? it looks like black has an obvious advantage in the resulting endgame.  white will have to grovel for a draw.  Yes with perfect play it is most likly a draw, but since black has a bishop and white has a weak back rank, black has very big winning chances.  Black can also keep the bishop pair if he wants to, unlike in the puzzle.

Also if you didn't see the next move, Qc7 was a mistake. you might have played a good move, but you didn't see the critical variation and you didn't know how to play out of it.

Here is the puzzle version

 How can black keep the bishop pair ? all move seems to be forced moves. all other moves than bxc7 scores bad for black.

oh yeah looks that way lol

Key is X-Ray

I don't see the importance, you'll have to elaborate. 

This is kind of like thinking up a really good comeback a week after someone insulted you.  It's too late, it doesn't matter.  The point of analysis is to find and correct errors in your play.  This admittedly neat looking tactic will not improve your play in future games.

Unfortunately computer analysis gives this illusion of providing useful corrections and enables the unfortunate player to immediately push the game aside without learning a single thing from the game that will carry over into his future games.

 I think you can learn when things look bad there may be a saving move and it worth looking after it.

 But you must look for it before you play Qxc7...

It doesn't take an expert to see that Ng6+ = royal fork. From there on, it's just a matter of time to find the exact combination...

 you asked for a saving move.The threat of Qxh2 or Bxc7 is gone when you play Nf6+.