Event: Division 4

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Opponent Rating Result
Mark Croasdale 0 ½ - ½
Simon Holin 1633 0 - 1
Mike H Wood 1704 ½ - ½
John Lascelles 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

734 = (3337 + 400 * (0 - 1)) / 4)

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