Event: 6-Board Division 2

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Opponent	Rating	Result
Keith Thompson	163	0 - 1
Olegs Dukalevs	142	½ - ½
Derek A Sheppard	135	½ - ½
John Scotter	115	½ - ½
Daniël Andel	145	0 - 1

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

-20 = (700 + 400 * (0 - 2)) / 5)