Event: Division 1

Opponent Rating Result
Adrian N Walker 157 1 - 0
Paul Humphreys 126 ½ - ½
David Tuddenham 154 1 - 0
Jamie Beviss 145 0 - 1
Fernando Felicio 175 0 - 1
Darren Freeman 158 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

86 = (915 + 400 * (2 - 3)) / 6)

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