Event: Division 2

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Opponent Rating Result
Chris Haynes 1748 ½ - ½
Alex Carey 1806 0 - 1
Edward Small 1845 0 - 1
Harry Davison 1756 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1489 = (7155 + 400 * (0 - 3)) / 4)

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