Event: Summer League Division 2

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Opponent Rating Result
Henry Withington 158 ½ - ½
David J Grobler 1713 1 - 0
Gerald D Fletcher 1846 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1506 = (3717 + 400 * (2 - 0)) / 3)

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