Event: Open

Opponent Rating Result
Irvin B Ortega 209 0 - 1
Simon C Smith 160 0 - 1
Jonathon Vaughan 169 ½ - ½
Irvin B Ortega 209 ½ - ½
Simon C Smith 160 1 - 0
Jonathon Vaughan 169 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

46 = (1076 + 400 * (1 - 3)) / 6)

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