Event: Division 2

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Opponent	Rating	Result
Michael Mason	1750	0 - 1
Mathew Wilson	1530	0 - 1
Aidan T Corish	1776	½ - ½

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

1419 = (5056 + 400 * (0 - 2)) / 3)