Event: u1850 County Championship

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Opponent Rating Result
Martyn Colebrook 1489 0 - 1
Chris Flynn 1577 ½ - ½
Andrew Spanoudakis 1700 0 - 1
Alonso Paez 1594 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1290 = (6360 + 400 * (0 - 3)) / 4)

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