Event: Division 7

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Opponent Rating Result
Arthur Gaseltine 1498 ½ - ½
Dave Mellon 1530 ½ - ½
Roger P Newman 1429 ½ - ½
David J Archer 1407 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1566 = (5864 + 400 * (1 - 0)) / 4)

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