Event: E (2) Division

Opponent Rating Result
John Paul O'Donnell 1615 0 - 1
Jonathan Burton 1400 ½ - ½
Phil Clare 1404 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1473 = (4419 + 400 * (1 - 1)) / 3)

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