Event: Silver Rook

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Opponent Rating Result
C Rodney S Mitchinson 109 ½ - ½
Neil S Shaw 0 0 - 1
Angelica Rowe 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-97 = (109 + 400 * (0 - 1)) / 3)

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