Event: Maidstone Players Trophy

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Opponent	Rating	Result
David A Munford	168	0 - 1
Douglas J Smith	117	1 - 0
Rebecca J Rutter	67	0 - 1

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

-16 = (352 + 400 * (1 - 2)) / 3)