Event: Haslemere Trophy

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Opponent Rating Result
Rory Davies 0 1 - 0
Colin Purdon 2130 1 - 0
Rory Davies 0 0 - 1
Colin Purdon 2130 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1065 = (4260 + 400 * (2 - 2)) / 4)

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