Event: Douglas Championship

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Opponent Rating Result
Neil T Davies 1919 0 - 1
Colin Watkinson 1300 0 - 1
Callum Quirk 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1156 = (4669 + 400 * (0 - 3)) / 3)

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