Event: Larry Guard League

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Opponent	Rating	Result
James H Parsons	67	0 - 1
Michael Ghillyer	56	0 - 1
Michael Ghillyer	56	0 - 1
Graham A Mill-Wilson	108	0 - 1
James H Parsons	67	1 - 0
Anthony Tatam	92	1 - 0
Anthony Tatam	92	0 - 1
Paul Green	94	0 - 1

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

-121 = (632 + 400 * (2 - 6)) / 8)