Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Arthur Eastham 0 0 - 1
Michael W Simmons 1152 1 - 0
George Gledhill 0 1 - 0
Ian Barker 1581 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

783 = (2733 + 400 * (2 - 1)) / 4)

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