Event: Silver Rook

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Opponent Rating Result
James Annan 1804 1 - 0
Zana Aziz 1798 0 - 1
Dion Luzha 1585 1 - 0
Keith Marsh 1698 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1921 = (6885 + 400 * (3 - 1)) / 4)

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