Event: 2023 Club Championship

Opponent Rating Result
James A Briginshaw 1800 ½ - ½
Paul McMahon 1920 0 - 1
Simon Marsden 1558 0 - 1
Nathan Weersing 1581 0 - 1
John Nevin 1462 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1504 = (8321 + 400 * (1 - 3)) / 5)

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