Event: Mini League

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Opponent Rating Result
David Summerland 1542 1 - 0
Dominic Gallagher 1596 1 - 0
Paul Gelder 1602 1 - 0
John Grasham 1632 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1893 = (6372 + 400 * (3 - 0)) / 4)

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