Event: Open County Championship

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Opponent Rating Result
Alan B Merry 2515 0 - 1
Michael Harris 2327 0 - 1
Declan Shafi 2288 ½ - ½
Alan B Merry 2515 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2211 = (9645 + 400 * (0 - 2)) / 4)

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