Event: Open

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Opponent	Rating	Result
Ian Emery	173	½ - ½
Emil Angelov	165	0 - 1
Anthony Sadler	149	½ - ½
Kevin Hurney	193	1 - 0
John E Crump	168	0 - 1
Eduardo Sanchez	148	½ - ½
Ian Emery	173	0 - 1
Emil Angelov	165	0 - 1
Anthony Sadler	149	1 - 0
Kevin Hurney	193	0 - 1
John E Crump	168	0 - 1
Eduardo Sanchez	148	0 - 1

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

-1 = (1992 + 400 * (2 - 7)) / 12)