Event: York Club Championship

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Opponent	Rating	Result
Paul M Barber	1993	0 - 1
Norman G Andrews	1575	0 - 1
Ian Craig	1415	1 - 0(def)
Jack Howorth	1597	0 - 1
John Foo	1495	0 - 1
Toby Conyers-Kelly	1160	1 - 0
Vinayak Prasad	1329	1 - 0
Will Orpin	953	1 - 0

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

1386 = (10102 + 400 * (3 - 4)) / 7)