Event: Beverley Club Championship

Opponent Rating Result
Esmond Harding 74 1 - 0
Edward S Oxley 142 ½ - ½
Bruce R Oliver 134 1 - 0
Douglas Vleeshhouwer 172 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

231 = (522 + 400 * (2 - 1)) / 4)

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