Event: 6th Somerset New Year Major

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Opponent	Rating	Result
Richard J Johnson	1892	0 - 1
Benjamin Lappin	1943	1 - 0
H William Ingham	1873	0 - 1

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

1769 = (5708 + 400 * (1 - 2)) / 3)