Event: League Division 2

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Opponent	Rating	Result
Andy J Bagley	1870	½ - ½
John Hipshon	1732	½ - ½
Rowan Andrews	0	1 - 0
Paul Salisbury	1705	½ - ½
Robert Dennington	1599	½ - ½
Neil Calderbank	0	½ - ½
Andy J Bagley	1870	½ - ½

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

1311 = (8776 + 400 * (1 - 0)) / 7)