Event: Division 5

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Opponent Rating Result
Joshua T Brown 77 1 - 0
Joshua T Brown 77 0 - 1
Lukasz Michalek 65 ½ - ½
Peter FK Evans 87 0 - 1
David E Ashby 94 1 - 0
David Hackney 67 0 - 1
Martin J Chadwick 65 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-38 = (532 + 400 * (2 - 4)) / 7)

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