Event: Summer League Division 2

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Opponent Rating Result
Tim Gollins 1855 0 - 1
Geoffrey D Brown 1783 0 - 1
Robert Porter 1624 ½ - ½
Barry Williams 1665 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1632 = (6927 + 400 * (1 - 2)) / 4)

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