Event: Club Championship Div 1

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Opponent Rating Result
Martin F Frisher 1792 1 - 0
Martin J Burns 1916 0 - 1
Andrew L Raeburn 1792 ½ - ½
Richard WY Lee 2135 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1809 = (7635 + 400 * (1 - 2)) / 4)

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