Event: Silver Rook

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Opponent Rating Result
Nicholas Mahoney 153 0 - 1
Sylvan Clarke 72 1 - 0
Howard Brears 112 1 - 0
Richard Hersey 117 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

114 = (454 + 400 * (2 - 2)) / 4)

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