Event: Clough (Handicap)

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Opponent	Rating	Result
Graham N Redmond	158	0 - 1
Dave Colledge	127	0 - 1
David Webster	0	1 - 0

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

-38 = (285 + 400 * (1 - 2)) / 3)