Event: Open County Championship

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Opponent Rating Result
David J Spence 2240 ½ - ½
Ken B McEwan 2172 1 - 0
Agoston Mihalik 2223 1 - 0
Jaden Jermy 2070 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2276 = (8705 + 400 * (2 - 1)) / 4)

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