Event: Silver Rook

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Opponent Rating Result
Chris Roche 120 ½ - ½
John Hipshon 123 0 - 1
Byron Lindley 0 1 - 0
Werner Rieser 100 ½ - ½
Richard Gration 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-11 = (343 + 400 * (1 - 2)) / 5)

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