Event: Division 2

Opponent Rating Result
John Cawdery 2089 0 - 1
Matthew S Tillett 1947 0 - 1
Jonathan DM Tymms 1929 1 - 0
Hendrik Brackmann 2104 ½ - ½
Julian Morrison 2066 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1947 = (10135 + 400 * (1 - 2)) / 5)

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