Event: Division 2

Opponent Rating Result
Andy Medcalf 1551 ½ - ½
Howard Brears 1665 1 - 0
Ric Woodcock 1400 0 - 1
John Foo 1508 0 - 1
Jack Howorth 1647 0 - 1
Paul W Jones 1643 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1436 = (9414 + 400 * (1 - 3)) / 6)

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