Event: Hillingdon Div 1

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Opponent Rating Result
Jason Obihara 1757 1 - 0
Barry DA Fraser 1475 1 - 0
Austin Ivan 1754 0 - 1
David Knight 1701 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1672 = (6687 + 400 * (2 - 2)) / 4)

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