Event: London Banks Team Swiss 2006-07

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Opponent	Rating	Result
Michael JM Rose	0	0 - 1
Edward I Long	0	0 - 1
Robert Parr	0	1 - 0
Laurence A Wilson	0	0 - 1

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

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