Event: Silver Rook

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Opponent Rating Result
Andrew Teh 0 1 - 0
Donna Chadwick 0 1 - 0
Sean Keddie 0 0 - 1
Paul R Chambers 0 1 - 0
John Tate 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

80 = (0 + 400 * (3 - 2)) / 5)

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