Event: Pre-Season Swiss

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Opponent	Rating	Result
Harry James	1148	0 - 1
Joseph P Alcock	1543	0 - 1
Alan M Willett	800	1 - 0

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

1030 = (3491 + 400 * (1 - 2)) / 3)