Event: Division 2

Opponent Rating Result
Laurence A Butt 1882 ½ - ½
John D Kimber 1816 1 - 0
Jonathan Bedingham 1246 1 - 0
Graham Robertson 1633 1 - 0
David Wallis 1594 1 - 0
Robert Wall 1679 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1908 = (9850 + 400 * (4 - 0)) / 6)

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