Event: Division 4A

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Opponent Rating Result
James Bartram 1589 0 - 1
Tom Rosenberg 1811 0 - 1
Christopher Burt 1347 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1449 = (4747 + 400 * (1 - 2)) / 3)

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