Event: Atkinson Cup

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Opponent	Rating	Result
Steve Hughes	1439	1 - 0
Giles Dunn	1665	1 - 0
Lester Jones	1528	1 - 0

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

1944 = (4632 + 400 * (3 - 0)) / 3)