Event: Knackered Knight

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Opponent	Rating	Result
Ewan F Corden	1088	1 - 0
Samuel A Parry	1983	0 - 1
Harry James	1148	1 - 0
David E Shiers	1615	1 - 0
MW Copeland	0	0 - 1

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

1247 = (5834 + 400 * (3 - 2)) / 5)