Event: Div 2 (Cracknell 23)

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Opponent	Rating	Result
Chris Mulholland	1133	1 - 0
Jack Carmody	1281	0 - 1
Steve Fairhurst	1195	1 - 0

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

1336 = (3609 + 400 * (2 - 1)) / 3)