Event: Club Championship

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Opponent Rating Result
Graham J Ashcroft 165 0 - 1
Alan Pidcock 138 0 - 1
Deborah Carter 73 ½ - ½
Gordon L Glover 128 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-74 = (504 + 400 * (0 - 2)) / 4)

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