Event: Major

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Opponent Rating Result
Alan H Palmer 1788 1 - 0
Erasmus Kahane 1750 ½ - ½
Gary Shelley 1368 ½ - ½
Barry DA Fraser 1450 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1789 = (6356 + 400 * (2 - 0)) / 4)

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