Event: Summer Rapid

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Opponent Rating Result
Philip N Birks 1700 0 - 1
Roger W Walker 1825 0 - 1
S Ali Arshad 1208 1 - 0
Alan M Willett 1414 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1537 = (6147 + 400 * (2 - 2)) / 4)

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