Event: Two East

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Opponent Rating Result
David J White 1863 1 - 0
Peter J Sullivan 2095 0 - 1
Joao AA Santos 2013 0 - 1
James J McDonnell 1862 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1758 = (7833 + 400 * (1 - 3)) / 4)

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