Event: Rapidplay Cup

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Opponent Rating Result
Nigel Bennett 1440 1 - 0
Nigel Bennett 1440 0 - 1
Torrin Anderson 1647 1 - 0
Torrin Anderson 1647 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1544 = (6174 + 400 * (2 - 2)) / 4)

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