Event: Silver Rook

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Opponent Rating Result
Christopher Lund 127 ½ - ½
Steve Harrington 119 0 - 1
Fraser Yang-Turner 84 0 - 1
Angelica Rowe 69 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-200 = (399 + 400 * (0 - 3)) / 4)

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