Event: Dudley & District League Div 2

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Opponent	Rating	Result
Peter J Pearson Jones	1698	1 - 0
Javier Castells Gil	1717	1 - 0
Alan T Woollaston	1617	1 - 0
Philip J Jones	1510	0 - 1
Leslie Andrews	1536	½ - ½
Barry Hearn	450	1 - 0
George McCumiskey	1110	1 - 0

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

1605 = (9638 + 400 * (5 - 1)) / 7)