Event: Division 1

Opponent Rating Result
Leslie J Crane 1861 0 - 1
Stephen W Berkley 1723 ½ - ½
John A Figgins 1651 ½ - ½
Graham J Kershaw 1712 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1637 = (6947 + 400 * (0 - 1)) / 4)

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