Event: Rapid Play

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Opponent Rating Result
William Owen 1076 1 - 0
Githma Madukalpa 1905 0 - 1
Martin Newton 1429 0 - 1
Martin Newton 1429 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1260 = (5839 + 400 * (1 - 3)) / 4)

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