Event: Riviera U1800 2023

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Opponent Rating Result
Christopher M Southall 1682 0 - 1
Arthur Hibbitt 1737 0 - 1
Elmira Walker 1626 ½ - ½
Michael J Gunn 1620 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1566 = (6665 + 400 * (1 - 2)) / 4)

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