Event: 4 Board League B

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Opponent	Rating	Result
Mark McGinty	1570	0 - 1
Phil Callaghan	0	1 - 0
Mike J Barnett	1671	0 - 1

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

947 = (3241 + 400 * (1 - 2)) / 3)