Event: Walker Shield

Opponent Rating Result
John L Clarke 92 ½ - ½
David Erwee 95 ½ - ½
Gary Hilleard 107 ½ - ½
David Erwee 95 0 - 1
Oli Garrett 106 1 - 0
John R Couzens 108 ½ - ½
Sean Duffy 71 1 - 0
John Dickie 90 ½ - ½
Robert Cronin 90 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

139 = (854 + 400 * (2 - 1)) / 9)

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