Event: IM Brown Shield

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Opponent Rating Result
Martin S Simmonds 1772 ½ - ½
Barry Marshall 1708 1 - 0
Dylan Noonan 1478 1 - 0
Richard Porter 1879 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1909 = (6837 + 400 * (2 - 0)) / 4)

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