Ouch! I have to share this game -- I came up with a cute trick, then blew it by sheer carelessness -- and not mental carelessness either, PHSYICAL carelessness! This was a street chess game, I was playing black. Here was the position, to the best of my memory, with white to move (at the url)...
(board shown from both standard white perspective and my perspective)
http://www.musicosphere.com/blownwin.jpg
This was a hard-fought game, albeit with a bunch of mistakes on both sides -- I came to an early development lead, got into trouble in the middle with a pawn attack, losing several pawns, but got out of it mainly because he made a small blunder and let me sneak a fork in, winning a knight. Then I had doubled my rooks and gave his king some serious shit with queens off the board, but he eventually stopped the attack by trading.
Anyway, after that, we moved into the rook and bishop endgame on this position.
He moved Bxb6, trying to pass the pawn via a bishop sacrifice. Now, if I was a sensible person, I would have accepted the sacrifice and returned it later to stop the pawn, running something along the lines of ... a7xb6, a7 B-c6, a8 queens Bxa8, Rxa8. Then I probably would have had a winning position with the pawn up, which was in range to be protected from the rook by the king, and bringing his king into range would have cost him his last pawn, passing my other pawn, and one of the damn things would have promoted.
But OH NO. I had to be CUTE. I had to try an TRICK. Instead of sensibly capturing the bishop, I thought Since my king has the opposition, controlling the 6th rank, I can sacrifice the extra pawn to force a skewer on the rook!
Play proceeded as follows...
... B-c6, Bxa7 (falling for the bait. Really, any rook move on the a file would have screwed me at that point, R-a3ch being favorite as it would have allowed him to grab the extra pawn anyway.)
Now, my INTENTION was to follow that with
... R-h2ch, K-g1(or e1 or f1), R-h1ch k moves, Rxa1. That would have been beautiful, and I would have won effortlessly.
Except... I SCREWED UP ON A TOUCH RULE! I'd already done that once that game, because I usually don't play with the touch-move rule, but he let me take it back. So, the crux is, I DIDN'T actually move the rook to h2, even though I entirely meant to, and ended up resigning a few moves later when, in complete dispair, I moved my king into the wrong position and lost the other pawn.
Waaaaaaaaahhhhhh.