Event: Division 2

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Opponent Rating Result
Mark S Wadsworth 1744 ½ - ½
Robert Owens 1595 0 - 1
Joshua Gibbs 1510 0 - 1
Alan Jackson 1597 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1312 = (6446 + 400 * (0 - 3)) / 4)

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