Event: Atkinson Cup

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Opponent	Rating	Result
Chris J Matthews	1822	1 - 0
Lester Jones	1521	1 - 0
Paul SN Kendall	1912	1 - 0

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

2152 = (5255 + 400 * (3 - 0)) / 3)