Event: Division 2

Opponent Rating Result
Barry Whitelaw 136 ½ - ½
Ian R White 157 0 - 1
Chris Haynes 140 0 - 1
John Lightowler 138 1 - 0
Barry Whitelaw 136 0 - 1
Robert Ashworth 159 0 - 1
Phil Markham 162 ½ - ½
Rob E Wilden 153 ½ - ½
John Lightowler 140 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

13 = (1321 + 400 * (1 - 4)) / 9)

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