Event: Open-Rapid-play

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Opponent Rating Result
Cory S Hazlehurst 2059 0 - 1
Phil Bull 1734 1 - 0
Cory S Hazlehurst 2059 0 - 1
Phil Bull 1734 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1797 = (7586 + 400 * (1 - 2)) / 4)

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