Event: Division 2

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Opponent Rating Result
Amanthika Anbalagan 1684 ½ - ½
Mike Herbert 1673 0 - 1
Paul D Rees 1631 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1663 = (4988 + 400 * (1 - 1)) / 3)

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