Event: Roger Goldsmith Div 2

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Opponent Rating Result
Rob Davies 1340 0 - 1
Christopher Thomson 1300 1 - 0
Gabriel Varea 1100 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1113 = (3740 + 400 * (1 - 2)) / 3)

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