Event: Derby & District Division 1

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Opponent	Rating	Result
David Williams	1868	0 - 1
Carl Gartside	1846	0 - 1
Kieran Redhead	1642	1 - 0

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

1652 = (5356 + 400 * (1 - 2)) / 3)