Event: Division 2

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Opponent Rating Result
James Irwin 1817 ½ - ½
Daniel Such 1601 0 - 1
Alonso Paez 1618 0 - 1
Alan J Lewis 1524 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1340 = (6560 + 400 * (0 - 3)) / 4)

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