Event: Division 4

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Opponent Rating Result
John Conway 1573 0 - 1
Matthew Allen 1600 ½ - ½
Hok Chiu 1253 1 - 0
Robert Kovacs 1486 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1578 = (5912 + 400 * (2 - 1)) / 4)

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