Event: Challengers - U1900

Opponent Rating Result
Omar Oliveri 1628 0 - 1
Rob Mitchell 1714 0 - 1
John K Robinson 1695 1 - 0
Ben W Vaughan 1638 ½ - ½
Paul Mottram 1739 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1603 = (8414 + 400 * (1 - 2)) / 5)

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