Event: Plummer Trophy

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Opponent Rating Result
Dona Strauss 1646 1 - 0
Mathias Keiller 1262 0 - 1
Paul R Selby 1756 0 - 1
Paul Edwards 1789 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1513 = (6453 + 400 * (1 - 2)) / 4)

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