Event: Combined Banks and Insurance Chess League 2008-09

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Opponent	Rating	Result
Brendan Keenan	0	1 - 0
V Ray Harper	0	1 - 0
James H Aldred	0	½ - ½
Laurence Ball	0	½ - ½
William Diffey	0	1 - 0

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

240 = (0 + 400 * (3 - 0)) / 5)