Event: John Davis 6200 League

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Opponent Rating Result
Paul Jordan 1630 0 - 1
Steven Scullion 1418 0 - 1
Howard D Sleeman 1455 1 - 0
Paul Capstick 1330 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1458 = (5833 + 400 * (2 - 2)) / 4)

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