Event: Division 2

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Opponent Rating Result
John F Turnock 1867 ½ - ½
Ray Devenney 1761 0 - 1
Mick D Riding 1927 0 - 1
John F Turnock 1869 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1556 = (7424 + 400 * (0 - 3)) / 4)

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