Event: Division 4

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Opponent Rating Result
John Tassi 130 1 - 0
Graham I Ladds 150 0 - 1
John Tassi 130 ½ - ½
Richard Myers 149 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

40 = (559 + 400 * (1 - 2)) / 4)

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