Event: Division 2

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Opponent Rating Result
Timothy Lunn 1982 0 - 1
Peter A Gemmell 2078 ½ - ½
Rod M Saines 1736 ½ - ½
Samuel Gaffney 1856 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1813 = (7652 + 400 * (0 - 1)) / 4)

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