Event: York Club Championship

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Opponent	Rating	Result
Paul A Johnson	1892	0 - 1
Philippe Radault	1612	1 - 0
Paul W Jones	1650	0 - 1
Vinayak Prasad	1368	½ - ½
Ian Craig	1420	½ - ½
David Wm Smith	1717	0 - 1
Paul Masiak	1400	1 - 0
Toby Conyers-Kelly	1168	½ - ½

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

1478 = (12227 + 400 * (2 - 3)) / 8)