You can't add a fixed ELO offset per stone because games between stronger players have much lower variance in score. A handicap stone is approximately a score offset (about 7.5 points for the first handicap stone, and about 15 points for each additional stone).
ELO measures probability of winning. A 2 stone handicap game between equal high dan players has a very high probability of black winning, so there must be a large ELO offset. A 2 stone game between low kyu players gives black a small increment in winning probability, so the ELO offset must be small. David > I think the two systems can be married by adding a fixed offset per stone > handicap to your ELO. > > - Don _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/