Event: Club Championship

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Opponent Rating Result
Alan Pidcock 1811 0 - 1
Graham J Ashcroft 1866 0 - 1
Guy McCombe 1315 1 - 0
Sebastien Szydlowski 1636 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1657 = (6628 + 400 * (2 - 2)) / 4)

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