Event: Club Championship

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Opponent Rating Result
Robert J Arthurton 1620 1 - 0
Gary Winson 1451 0 - 1
Alan Ward 1351 0 - 1
Doug Fossey 961 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1346 = (5383 + 400 * (2 - 2)) / 4)

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