Event: Division 4

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Opponent Rating Result
Roger J Edwards 123 ½ - ½
Lukasz Michalek 110 0 - 1
Stuart E Hull 94 ½ - ½
Derek Whitehurst 104 0 - 1
Lukasz Michalek 110 ½ - ½
David Hackney 80 1 - 0
Roger Coleman 80 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

43 = (701 + 400 * (1 - 2)) / 7)

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