Event: 4 Board League A

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Opponent Rating Result
Robert Pells 1713 1 - 0
Colin S Procter 1893 0 - 1
Andrew Walker 1440 ½ - ½
Les Johnson 1687 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1583 = (6733 + 400 * (1 - 2)) / 4)

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