Event: Division 1

Opponent Rating Result
Vivien Webster 137 1 - 0
Keith Marsh 1668 ½ - ½
Andrew Walker 1412 1 - 0
Bill Tait 1680 1 - 0
Peter D Rooney 2078 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1635 = (6975 + 400 * (3 - 0)) / 5)

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