Another method of levelling the playing field is to change stones[1] every 20 moves. This is a very interesting way to play. As the game nears endgame, an adjudicator tells the player to discontinue swapping stones. This has the purpose of putting the stronger player at a disadvantage at the beginning of the endgame, which should make for a close finish.
I've played this a few times now. Sometimes with close rank players, other times with a big difference in ranks, and have found it to be most enjoyable, although the head does hurt when you have to undo your own tesuji's.
LOL
Give it a try!
unkx80: Given the page title, I would think of reverse komi instead.
[1] Robert Pauli: change stones seems to be change colors, right ?
Bill: As in the Ear Reddening Game ? ;-)
Robert Pauli: No, as when calamaries play go... ;-)
Tom: How about randomising when the sides change, say a 0.01 chance each move. Towards the end of the game, the stronger player should start to build an advantage.