Event: B&DCL Div 2

Opponent Rating Result
Ken Smith 145 0 - 1
John A Oldfield 137 1 - 0
Peter Donaldson 144 0 - 1
Barry MS Jolly 132 ½ - ½
Alan J Tyler 135 ½ - ½
Michael Honey 132 1 - 0
Paul A Bland 117 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

135 = (942 + 400 * (2 - 2)) / 7)

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