Event: Division 4

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Opponent Rating Result
Simon M Hall 1500 1 - 0
Charlie Papworth 1687 ½ - ½
Charles Higenbottam 1339 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1775 = (4526 + 400 * (2 - 0)) / 3)

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