Event: Division 4

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Opponent Rating Result
David Wilson 1319 1 - 0
John D Robinson 1557 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1438 = (2876 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Jonathan Zeng 1366 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1766 = (1366 + 400 * (1 - 0)) / 1)