Event: Open

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Opponent Rating Result
John E Crump 169 0 - 1
Rajeev P Raghavan 0 1 - 0
Dave M Davies 150 1 - 0
Rajeev P Raghavan 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

80 = (319 + 400 * (2 - 2)) / 4)

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