Event: Div 2 (Cracknell 23)

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Opponent	Rating	Result
Steve Fairhurst	1133	1 - 0
Jimmy Blair	1522	1 - 0
Adam Majewski	1391	1 - 0
Dmytro Gostiev	1552	0 - 1
Karl Bennett	1440	1 - 0
Frederick Fairhurst	1388	1 - 0
Dmytro Gostiev	1567	1 - 0

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

1713 = (9993 + 400 * (6 - 1)) / 7)