Event: Division 4A

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Opponent Rating Result
Lukasz Krepa 0 0 - 1
Christopher Burt 1375 1 - 0
William Smith 1370 1 - 0
Richard Kirk 1069 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1154 = (3814 + 400 * (3 - 1)) / 4)

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