You see a good 5+ move combination. You test it's refutation. You look at variations. You find them winning too. You test the variations for refutations, and all variations of refutations. Finally, you put all of this in conditional moves, certain you covered all of your opponents good defensive moves and hoping that somewhere during this line your opponent will see himself lost and resign.

And the next day, when you come back on Chess.com, you see that after all that hard work on analysis and inputting conditional moves...

Your opponent played a blunder on the very next move.

I guess it depends what your objective is. Fun, win, or see your permutations work itself out. :P

At least its good practice to figure out all variations and refutations.

(Kingfisher, dont post, your post count is elite )

I've had that experience. Typical conditional move scenarios are when the game is pretty much easily winning and conditional moves can cut down on lag time between me and my opponent not being online at the same time. So while in terms of number of moves, the blunder makes the game shorter, it can make the game longer in real time. I usually just chuckle to myself -- the game will be over soon enough.