Event: Division 3

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Opponent Rating Result
James Bingham 1637 0 - 1
Stuart P Iles 1776 0 - 1
Michael Stinchcombe 1395 1 - 0
Jeremy Gardner 1682 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1423 = (6490 + 400 * (1 - 3)) / 4)

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