Event: Div1

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Opponent	Rating	Result
Peter JE Ackley	189	½ - ½
Ray J Forey	177	1 - 0
Antony A Clare	169	0 - 1
Kenneth GE Morrison	172	½ - ½
Mike Alcock	163	0 - 1
Steven J Burke	172	1 - 0
Ranjit Nath	155	½ - ½
Hambel M Willow	133	1 - 0
Kenneth GE Morrison	172	0 - 1
David Williams	159	½ - ½
Edward T Bromilow	157	½ - ½

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

165 = (1818 + 400 * (3 - 3)) / 11)