Event: Worcestershire Championship League

Opponent Rating Result
John A Edge 2072 0 - 1
Gavin Cartwright 1859 ½ - ½
Brian Turner 1970 ½ - ½
David Smith 1801 1 - 0
David M Cooper 2015 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1863 = (9717 + 400 * (1 - 2)) / 5)

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