Event: Division 5

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Opponent Rating Result
John F Turnock 1867 ½ - ½
Ray Garside 1464 ½ - ½
Martin Thompson 1406 1 - 0
Alan Johnson 1595 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1683 = (6332 + 400 * (1 - 0)) / 4)

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