Event: Riviera P.M. Open 2023

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Opponent Rating Result
Graham Bolt 2043 ½ - ½
David P Littlejohns 1985 ½ - ½
H William Ingham 1926 ½ - ½
David L Roberts 2007 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1890 = (7961 + 400 * (0 - 1)) / 4)

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