I haven't played three-handed chess, but I have played other three person chess games. They tend to suffer from the king-maker problem. That is, one player often ends up with no chance of winning, but the ability to decide who does win.
Three-handed Chess

hello, i know place to play three chess game: http://www.threechess.com/ you can play even against other players online....

I posted a series of questions a few days ago in a different thread on the same subject, but they have yet to be answered.
http://www.chess.com/forum/view/general/three-player-chess-board?cid=27186084#last_comment
"Curious: when pawns move to the higest rank in their colored territory, what exactly is considered a diagonal square legal of capture? Because, a pawn on D4, E4, D9, K9, K5 and E5, as it looks to me, have 3 'diagonal' forward squares. Are all three of those considered legal captures?
Also, if a white Rook stands on E1, is it legal to also capture the pawn on e6 while moving as far as N5?
Unless I missed the set of rules posted somewhere, it would be nice if these things are clarified; since we're not dealing with an 8x8 dimension** anymore.
**(How would we mathematically describe a hexagonal board as this? 8x4x3, I'm guessing?)
"
I was wondering if anyone has played Three-handed Chess before and what they thought about it. It seems like it can get extremely complex after just a few moves.
http://en.wikipedia.org/wiki/Three-handed_chess
Better yet... does anyone know a place to play it online? If so, want to play with me?