Event: Division 4A

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Opponent	Rating	Result
George Southcott	0	0 - 1
Tom Jillians	1695	0 - 1
Julian Bartram	1014	½ - ½

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

636 = (2709 + 400 * (0 - 2)) / 3)