Event: Division 2

Opponent Rating Result
Peter D Kemp 2134 0 - 1
Charlie Wannasin Bell 1638 ½ - ½
Chris Lake 1767 0 - 1
Peter Rankin 1681 1 - 0
Jo Carthew 1627 1 - 0
William F Tracey 1605 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1809 = (10452 + 400 * (3 - 2)) / 6)

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