Event: Silver Rook

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Opponent Rating Result
Aaron Rich 1876 0 - 1
Greg Billenness 1852 0 - 1
Ian D Strickland 1615 1 - 0
Martin Baxter 1668 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1653 = (7011 + 400 * (1 - 2)) / 4)

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