Event: Dave Welch 7200 League

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Opponent	Rating	Result
Dylan Mize	1892	0 - 1
James Clarke	1783	1 - 0
Xavier Sottrel	1762	0 - 1

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

1679 = (5437 + 400 * (1 - 2)) / 3)