Event: Rook 2019-20

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Opponent Rating Result
David N Roberts 170 ½ - ½
James C Mansson 189 ½ - ½
Chris W Heath 158 ½ - ½
Mark Broom 193 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

278 = (710 + 400 * (1 - 0)) / 4)

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