Event: Division 4A

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Opponent	Rating	Result
James Bartram	1589	0 - 1
Tom Rosenberg	1811	0 - 1
Christopher Burt	1347	1 - 0

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

1449 = (4747 + 400 * (1 - 2)) / 3)