Event: Silver Rook

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Opponent Rating Result
Emma Meng 0 1 - 0
Michael A Fox 122 0 - 1
David Halpin 63 1 - 0
Gary Jones 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

46 = (185 + 400 * (2 - 2)) / 4)

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