Event: Summer League Division 2

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Opponent Rating Result
Steven J Burke 167 ½ - ½
Daniel JS Sullivan 179 0 - 1
Andrew P Baxter 136 ½ - ½
Steve Withington 137 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

55 = (619 + 400 * (0 - 1)) / 4)

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