Event: South Cheshire Shield

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Opponent Rating Result
Sandra G Blackburn 1546 0 - 1
David J Stuart 1447 1 - 0
Jack Warren 1000 1 - 0
Matthew Dean 1150 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1486 = (5143 + 400 * (3 - 1)) / 4)

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