Event: Clough (Handicap)

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Opponent	Rating	Result
Chris S Edwards	133	0 - 1
Dennis Palframan	99	1 - 0
Julian Toothill	116	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-17 = (348 + 400 * (1 - 2)) / 3)