Event: League

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Opponent Rating Result
Steven Lewis 157 0 - 1
Denis Georgiou 163 1 - 0
Denis Georgiou 163 0 - 1
Jason Dew 129 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

53 = (612 + 400 * (1 - 2)) / 4)

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