Event: June Swiss 2023 Open

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Opponent Rating Result
David E Hall 1911 ½ - ½
Armando Galletti 1753 1 - 0
Martin G Walker 2193 0 - 1
Philip R Bonafont 2097 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1889 = (7954 + 400 * (1 - 2)) / 4)

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