Event: Mini League

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Opponent Rating Result
Stephen Burton 1408 ½ - ½
Andy Baker 1426 1 - 0
Oliver Smith 1417 0 - 1
Samir Cradock 1815 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1417 = (6066 + 400 * (1 - 2)) / 4)

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