Event: Bill Lumley Rapidplay

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Opponent	Rating	Result
Greg T Eagleton	187	0 - 1
Leo A Keely	178	0 - 1
Peter Shaw	204	½ - ½

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

-77 = (569 + 400 * (0 - 2)) / 3)