Event: NCCA League Division 2

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Opponent Rating Result
Mark A Nettleton 1398 0 - 1
Arthur Dannatt 1687 0 - 1
William F O'Connor 1236 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1307 = (4321 + 400 * (1 - 2)) / 3)

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