Event: B Division

Opponent Rating Result
Robert Donner 1652 0(def) - 1
Callum Abbott 1491 1 - 0
Keith Harrison 1577 1 - 0
David Kelly 1590 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1819 = (4658 + 400 * (2 - 0)) / 3)

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