Event: Worcestershire Rapidplay league

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Opponent	Rating	Result
John Pendrous	0	1 - 0
David Spowart	1771	1 - 0
Paul B Sharratt	1729	0 - 1
Aiden Griffiths	1623	1 - 0
Chris Lee	1612	1 - 0
John Pendrous	0	1 - 0
David Spowart	1771	1 - 0
Paul B Sharratt	1729	½ - ½
Aiden Griffiths	1623	1 - 0
Chris Lee	1612	1 - 0

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

1627 = (13470 + 400 * (8 - 1)) / 10)