Event: Folkestone Club Championship

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Opponent	Rating	Result
Otto Lucas	1090	1 - 0
Mariam Mohana	1341	0 - 1
James PW Smith	1368	0 - 1

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

1133 = (3799 + 400 * (1 - 2)) / 3)