Event: Open

Opponent Rating Result
Graham J Sharpe 2006 ½ - ½
Alan Agnew 2157 0 - 1
Philip J Horspool 2023 1 - 0
Julian Tarwid 1650 1 - 0
Lewis A Turner 2023 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1972 = (9859 + 400 * (2 - 2)) / 5)

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