Event: Division Four

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Opponent	Rating	Result
Mike J Groombridge	127	0 - 1
Anthony Stokes	132	0 - 1
Kevin Day	121	½ - ½
Peter W Lawrence	135	0 - 1
Penny A Wood	103	½ - ½
John Grant	134	0 - 1
AJ (Tony) Szatanik	108	½ - ½

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

-106 = (860 + 400 * (0 - 4)) / 7)