Event: Division 2 East

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Opponent Rating Result
David L Weston 135 ½ - ½
Chris S Purry 147 0 - 1
Bill Grant 115 1 - 0
David L Weston 135 ½ - ½
Jack Opie 117 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

210 = (649 + 400 * (2 - 1)) / 5)

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