Event: June Swiss 2023 Challengers

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Opponent Rating Result
Larysa Klepikovska 0 ½ - ½
Graham R Jones 1491 1 - 0
Matthew Taylor 1615 0 - 1
Colin R Payne 1652 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1090 = (4758 + 400 * (1 - 2)) / 4)

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