Event: Division 3

Opponent Rating Result
Michael I Williams 1717 1 - 0
Charles J Fletcher 1640 1 - 0
Chinenye Basil-Nwachuku 1619 0 - 1
Matt O'Keeffe 1665 0 - 1
Peter Mellor 1750 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1678 = (8391 + 400 * (2 - 2)) / 5)

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