Event: Division 3

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Opponent Rating Result
Arran Airlie 1801 0 - 1
William F Tracey 1598 0 - 1
Roland Rattray 1576 1 - 0
Robert Hopkins 1350 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1581 = (6325 + 400 * (2 - 2)) / 4)

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