Event: Hargreaves Shield

Opponent Rating Result
Tim Spencer 121 0 - 1
Robert Twigg 70 1 - 0
Reginald G Pidduck 107 0 - 1
Robert Twigg 70 1 - 0
Michael Doyle 81 0 - 1
Ray Rennells 75 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

87 = (524 + 400 * (3 - 3)) / 6)

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