Event: Combined Banks and Insurance Chess League 2008-09

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Opponent	Rating	Result
Ian N Heppell	0	0 - 1
Geoff W Naldrett	0	1 - 0
Anthony GC Paish	0	0 - 1
Les M Burgess	0	1 - 0
Brendan Keenan	0	0 - 1

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

-80 = (0 + 400 * (2 - 3)) / 5)