Event: Rook 2018-19

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Opponent	Rating	Result
Chris W Heath	157	0 - 1
Philip M Stimpson	168	½ - ½
Anthony RJ Higgs	176	0 - 1
James C Mansson	195	0 - 1
Lucy Bennet-Stevens	172	0 - 1
David N Roberts	166	0 - 1
Alex B Taylor	156	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-173 = (1190 + 400 * (0 - 6)) / 7)