Event: AG Sunderland

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Opponent	Rating	Result
James Weldon	1547	1 - 0
Fazal Rabbi	1701	0 - 1
Alex Rawse	1460	0 - 1

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

1436 = (4708 + 400 * (1 - 2)) / 3)