Event: NSDCA Division 4

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Opponent Rating Result
Ernest Wilkinson 1401 0 - 1
Lukas Hancock 1668 0 - 1
David A Hallen 1465 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1378 = (4534 + 400 * (1 - 2)) / 3)

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