Event: Dudley & District League Div 2

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Opponent	Rating	Result
Peter L Loach	1677	0 - 1
Philip J Jones	1567	½ - ½
George Relph	1500	0 - 1

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

1315 = (4744 + 400 * (0 - 2)) / 3)