Event: Combined Banks and Insurance Chess League 2009-10

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Opponent	Rating	Result
Geoff R Hermes	0	0 - 1
A D'Cruz	0	1 - 0
Colin AH Russ	0	1 - 0
David L Barrett	0	1 - 0

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

200 = (0 + 400 * (3 - 1)) / 4)