Event: Division 3

Opponent Rating Result
David M Cotterell 1546 1 - 0
William Hunt 1413 1 - 0
Richard Evans 1628 1 - 0
Nigel Foster 1568 ½ - ½
Nigel Morris 1536 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1698 = (7691 + 400 * (3 - 1)) / 5)

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