Event: Division 2

Opponent Rating Result
Simon Walton 1644 1 - 0
Steve Whatmore 1884 ½ - ½
David W Daniels 1840 ½ - ½
Mike A Biddle 1726 1 - 0
David J Friend 1609 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1981 = (8703 + 400 * (3 - 0)) / 5)

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