Event: Division 1 - Open

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Opponent	Rating	Result
Alan W Brusey	1983	½ - ½
David J Archer	1957	1 - 0
Paul Brooks	1883	1 - 0

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

2208 = (5823 + 400 * (2 - 0)) / 3)