Event: Durham League Division A

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Opponent Rating Result
Nicholas Webb 1757 0 - 1
Alex Potter 1662 0 - 1
Joseph Barr 0 0 - 1
Richard J Harris 1774 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

898 = (5193 + 400 * (0 - 4)) / 4)

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