I made a winning move a computer couldn't find

I thought this was interesting.  I was playing bullet chess, on a losing streak when I had this interesting game.  I decide to analyze it with computer analysis and was very surprised when I played a winning move the computer couldn't see at all.  With this move the computer's eval went from a 3 point advantage for black to a 3 point or so advantage for me :)

i'm starting to think i am misinterpreted the engine's eval.  It is a new engine and interface I have just downloaded.  But I'm still interested to hear if anybody has ever come up with a good move a computer couldn't see

Yep, 8.Qe2 is only a sliver of a pawn better than 8.Kd1. If you get an engine and GUI that both support multi-PV analysis, you can see multiple lines.

About the eval changing from -3 to +3, it's likely that your engine/GUI combo isn't set up for (or you didn't set it up) showing evals always from White's point of view. On one half move it would show you the eval from Black's point of view, then on the next half move, it would show you the eval from White's point of view. That's why the sign would keep flipping for every half move.

I would take a guess and say that chesshole is using Crafty as the engine. While most engines give an evaluation from the point of view of the colour to move, Crafty always gives it's evaluation from White's point of view. As for the game, according to HIARCS Black lost the advantage after the blunder 10...Qg4.

About Crafty, well not really. I can untick one setting on my GUI, and Crafty will happily flip the eval sign every half move. Put the tick mark back, and it will always be from White's POV.

I've come up with moves that the computer thought was bad at first, then thought some more and realized that it was actually okay. I've certainly played some centaur games where the same thing has happened to my detriment. I'd like to know what about the move made the eval. change so drastically.

thanks guys, i thought i was misinterpreting it.  yeah, and that makes sense what you said about the eval flipping Escher.  btw the engine i used was Stockfish and the interface I used was Arena.  I am surprised 'Houdini' is the best engine, I didn't check engine ratings for a while but I assumed that a version of Fritz or Rybka would be the top engine, maybe even Shredder.  I chose Stockfish because according to one website it is the third strongest chess engine and it is free. Arena is a free interface I downloaded too. 

where do you get the chess engine ratings??

http://www.computerchess.org.uk/ccrl/4040/

Hi chesshole

To get to the Arena POV checkbox, drill into the menu with:

Options -> Appearance -> Other settings -> Chess

and then check the checkbox for "Values always from white's point of view".

There's also a POV checkbox for individual engines that you might have to set at times (and sometimes this setting doesn't work on an engine anyway):

Engines -> Manage -> Details -> Special -> checkbox "Values absolute (always from white's side)"

Hey I did, what you suggested, thanks for the help 

Not ssure if this is what your looking for, but you can right click on the engine analysis pane and select Multi PV Mode. From there you can choose the number of moves/lines you want. Only possible if your engine supports Multi-PV.