Event: Gordon Nobbs League

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Opponent	Rating	Result
Anthony Tatam	94	0 - 1
Anthony Tatam	94	0 - 1
Nick J Butland	143	0 - 1
Nick J Butland	143	0 - 1
Michael Ghillyer	46	1 - 0
Edward L Pryce	65	1 - 0
Graham A Mill-Wilson	105	0 - 1
James H Parsons	61	0 - 1

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

-106 = (751 + 400 * (2 - 6)) / 8)