Event: Club Championship B Division

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Opponent Rating Result
David Pizzi 1473 0 - 1
Malcolm Goldspink 1050 0 - 1
William Rowett 900 0 - 1
Laura Holdforth 824 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

862 = (4247 + 400 * (1 - 3)) / 4)

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