Event: Division 3

Opponent Rating Result
Brian D Corner 1487 1 - 0
David P Price 1647 1 - 0
Chris Wentworth 1588 ½ - ½
Joe W Butterworth 1633 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1889 = (6355 + 400 * (3 - 0)) / 4)

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