Event: Division Three

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Opponent Rating Result
Stephen Briggs 1691 0 - 1
Ian Patterson 1174 1 - 0
Jack O'Hare 1289 ½ - ½
Alfredo Ramos-Alvarez 1507 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1515 = (5661 + 400 * (2 - 1)) / 4)

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