Event: Division 4

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Opponent Rating Result
Ben Ward 0 0 - 1
Gregory Sumner 1430 1 - 0
Simba Foluke 1126 1 - 0
Harry Duckworth 1404 0 - 1
Thomas Booth 1388 0 - 1
John D Robinson 1461 0 - 1
David Wilson 1314 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

989 = (8123 + 400 * (2 - 5)) / 7)

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