Event: Rated Friendlies

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Opponent Rating Result
Nick Deakin 1275 0 - 1
Gerald Parton 1218 1 - 0
Mario Scarpa 1348 0 - 1
Michael Keenan 1316 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1189 = (5157 + 400 * (1 - 2)) / 4)

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