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Event: Major

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Opponent Rating Result
Kenneth G Coates 181 ½ - ½
Simon Lunn 175 1 - 0
Colin Mackenzie 180 1 - 0
Andrew R Brett 186 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

481 = (722 + 400 * (3 - 0)) / 4)

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