Event: Division 3

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Opponent Rating Result
Mitchell Darkes 1406 0 - 1
Dave R Wingrove 1376 0 - 1
John S Burrows 1475 0 - 1
Ian Webster 1501 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1040 = (5758 + 400 * (0 - 4)) / 4)

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