Event: Silver Rook

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Opponent Rating Result
Dale H Cullum 113 1 - 0
Jim R Postill 120 ½ - ½
Stephen A Jennings 107 1 - 0
Mike Wilford 98 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

410 = (438 + 400 * (3 - 0)) / 4)

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