Event: Division 1

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Opponent Rating Result
Russell G Granat 2213 0 - 1
Janis Petersons 1874 ½ - ½
Vivian J Cole 1966 ½ - ½
W John Marshall 1777 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1858 = (7830 + 400 * (0 - 1)) / 4)

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