Event: BCL Division 2

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Opponent	Rating	Result
Dave Wells	1682	½ - ½
Alexander Potts	0	0 - 1
Dave Wells	1682	0 - 1
Andy Evans	1553	½ - ½
Alan Heath	1832	0 - 1
Richard McMorran	1678	0 - 1
Robert S Walker	1735	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1166 = (10162 + 400 * (0 - 5)) / 7)