Event: Summer League Division 4

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Opponent Rating Result
John HT Eddershaw 1319 1 - 0
John M Oughton 1255 1 - 0
Thomas Hancock 1574 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1516 = (4148 + 400 * (2 - 1)) / 3)

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