Event: Division 1

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Opponent Rating Result
Qixuan Han 1963 ½ - ½
Jack Sheard 1847 1 - 0
Graham P Alcock 1821 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2010 = (5631 + 400 * (1 - 0)) / 3)

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