Event: Division 3

Opponent Rating Result
Nigel Morris 1536 ½ - ½
Aiden Keavy 1663 ½ - ½
Arthur Hibbitt 1687 ½ - ½
David M Cotterell 1546 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1708 = (6432 + 400 * (1 - 0)) / 4)

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