Event: Derby & District Division 2

Opponent Rating Result
Brian Crofts 1572 0 - 1
Ray Sawyer 1742 ½ - ½
Richard Anderson 1889 0 - 1
Roger Moors 1503 1 - 0
Kevin J Gallagher 1655 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1592 = (8361 + 400 * (1 - 2)) / 5)

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