Event: Division 3

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Opponent Rating Result
David O Vaughan 1852 ½ - ½
Alan Clarke 1857 ½ - ½
Alastair JD Marston 1736 1 - 0
Gideon Gyeabour Ansu 1915 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2040 = (7360 + 400 * (2 - 0)) / 4)

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