Event: Norfolk and Norwich Championship

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Opponent Rating Result
Vivash Samarakoon 2120 0 - 1
Daniel Onaiwu 2050 1 - 0
Peter Stone 1942 ½ - ½
Ayomikun Adegboye 1733 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1861 = (7845 + 400 * (1 - 2)) / 4)

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