Event: Rook 2018-19

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Opponent Rating Result
David N Roberts 166 ½ - ½
Paul Richardson 145 1 - 0
Philip M Stimpson 168 ½ - ½
Chris W Heath 157 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

359 = (636 + 400 * (2 - 0)) / 4)

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