Event: 7 Cs 2021

Opponent Rating Result
David A Hallen 1471 ½ - ½
David Millington 1625 0 - 1
Joseph P Alcock 1541 0 - 1
Lewis J Corden 800 1 - 0
Alan M Willett 750 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1237 = (6187 + 400 * (2 - 2)) / 5)

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