Event: Super League (rapid)

Opponent Rating Result
Rob E Wilden 1836 1 - 0
Tristram De Piro 1770 0 - 1
John Jenkins 2076 0 - 1
David J Horton 1919 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1800 = (7601 + 400 * (1 - 2)) / 4)

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