Event: Eastman Cup

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Opponent Rating Result
Harry J Croasdale 1886 1 - 0
Graham DJ Keane 2179 0 - 1
John D White 1775 ½ - ½
Alan H Palmer 1743 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1896 = (7583 + 400 * (1 - 1)) / 4)

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