Event: Silver Rook

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Opponent Rating Result
Andrew Zigmond 123 1 - 0
Gary Jones 0 0 - 1
Gary Jones 0 ½ - ½
Shane Inglis 131 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-37 = (254 + 400 * (1 - 2)) / 4)

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