Event: Vince Skillcorn Summer Tournament 2023

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Opponent Rating Result
J Alan Stockley 1387 0 - 1
Stuart McLaughlin 1390 0 - 1
Sean Cooke 1090 1 - 0
Darren John Donnison 1501 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1142 = (5368 + 400 * (1 - 3)) / 4)

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