Event: Rook 2018-19

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Opponent Rating Result
Chris W Heath 157 ½ - ½
Anthony RJ Higgs 176 0 - 1
Alex B Taylor 156 ½ - ½
Paul Richardson 145 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

159 = (634 + 400 * (1 - 1)) / 4)

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