Event: Two West

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Opponent Rating Result
William B Drennan 1833 1 - 0
David C Helsby 1810 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2022 = (3643 + 400 * (1 - 0)) / 2)

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Opponent Rating Result
William B Drennan 1833 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1833 = (1833 + 400 * (0 - 0)) / 1)