Event: Rook 2019-20

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Opponent Rating Result
Mark Broom 200 1 - 0
Philip M Stimpson 175 ½ - ½
Chris W Heath 154 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

310 = (529 + 400 * (1 - 0)) / 3)

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