Event: Division 2

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Opponent Rating Result
Darren H Whitmore 1882 0 - 1
Joshua Simpson 1886 ½ - ½
Trevor J Holt 1760 1 - 0
Jonathan Fowler 1971 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1775 = (7499 + 400 * (1 - 2)) / 4)

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