Event: York Club Championship

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Opponent	Rating	Result
Steve R Hodge	1989	0 - 1
Norman G Andrews	1709	½ - ½
John Foo	0	1 - 0
Kai Taylor	0	1 - 0
Derek Toyne	0	1 - 0(def)
Matthew Drury	0	½ - ½
M Paul Townsend	0	0 - 1
Aaron Rich	1772	0 - 1

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

724 = (5470 + 400 * (2 - 3)) / 7)