warning:soon ccoming.

I always underpromote to torture my opponents.

Hi cabin2, a upside down rook is a rook, not a queen, according to modern rules of tournament play.

i trolled one israeli in a live game, i had 4 knights vs lone king, then i told him: "HIDE UR JEW GOLD, ITS A POGROM, COSSACKS ARE NEAR!"

one of my friends in a tournament promoted to a bishop to try to make the person resign because he was winning so badly. they didnt resign.

If you don't have extra queens, turn a captured rook (yours) upside down.

Only under promoted to TROLL!!!!! :D

No - But I had to use somthing else cause my set has no spare queens!

I usually promote to a queen, but there have been a few times where I've gone for a knight to get the checkmate.

I am always careful to not cause stalemate, I experience a very re-assuring feeling when I can see I have 2 queens, nothing else matters! 

http://blog.chess.com/kiwi_overtherainbow/why-i-love-and-hate-chess

ok i never always queen :D no need 2

lol i have all the reasons :D

mostly 2 show off lol

did u know u need 5 horses on a king for a checkmate in the ccentre? :P

lol i do

I never had a chess game when I should under-promote ;)

I've done it a few times, but once I promoted to a knight in order to play a check so that my opponent couldn't play mate in 1.

I just finsihed a game where I promoted to a knight and checkmate. If I hadpromoted to a queen I would still eventually checkmate but why give those extra moves.

http://www.chess.com/echess/game.html?id=52305435

(Not the prettiest game ever played but it finished nice)

I must confess that I was being a bit sadistic in one of my games (an OTB rated game) at my Chess club. My opponent was terribly busted in a highly simplified position with no Queen (I had my Queen!) and had no hint of any tricks or traps to do anything. In short, he had a very resignable setup. I desided to underpromote to a knight, knowing full well that I could have more than one Queen. He still played on. Most people would probably have realized that I was being a "ballbuster" and would have gotten the hint and tipped over their King. I could have argued that if he has the right to play to the bitter end, I certainly have the right to be "creative". He played on; I underpromoted to yet another knight. His face got redder. Two or three moves later, I under promoted to a third knight! Then, he resigned, did not shake my hand and did not come back to the club for 6 or 7 weeks. He did not even return my calls as I was getting guys for the next tournament. Obviously, he came back, was given a 1/2 point bye for missing the 1st round of the next tourney. All was well until he attempted to lecture me on good sportsmanship. I said to him that if I was going to hear the whole lecture he would have to sit still and hear a lecture from me on how one could sharpen their skills on looking like a fool. Needless to say, we shook hands and he admitted that it was I who on the board had, in essense, had given him the lesson on when to resign. He vowed to me if the roles were ever to be reversed, he would underpromote to bishops. We both laughed. The difference, of course, is that I am one who knows when to resign.

I once underpromoted to a knight because it gave me a check and the tempo I needed to stop my opponent from queening.

I won a won game with this underpromotion:

http://www.chess.com/echess/game.html?id=47971531

inconcievable81: I believe most people do NOT play Suicide. (Though you did give me a good laugh)