Event: Division 2

Opponent Rating Result
Stephen W Berkley 1761 ½ - ½
Peter Biggs 1686 1 - 0
Simon A White 1565 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1804 = (5012 + 400 * (1 - 0)) / 3)

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