Event: Open County Championship

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Opponent Rating Result
Raymond J Ilett 1929 1 - 0
Edward Matthewson 1927 1 - 0
Vivash Samarakoon 2108 0 - 1
Dan Waller 2086 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2213 = (8050 + 400 * (3 - 1)) / 4)

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