Event: NCCA League Division 3

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Opponent Rating Result
Henry Leather 1760 ½ - ½
Rupert E Guinness 1684 1 - 0
Carl Purkiss 1577 0 - 1
Charley James 1500 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1730 = (6521 + 400 * (2 - 1)) / 4)

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