Event: Division 4

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Opponent	Rating	Result
Ethan Tatters	1563	0 - 1
Alex Johnson	1470	1 - 0
Irina Briggs	1535	0 - 1

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

1389 = (4568 + 400 * (1 - 2)) / 3)