Event: Division A

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Opponent Rating Result
Cliff H Rutlidge 157 ½ - ½
James Carrington 151 0 - 1
John Addison 143 1 - 0
Graham J Ashcroft 163 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

154 = (614 + 400 * (1 - 1)) / 4)

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