Event: Worcestershire Rapidplay league

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Opponent	Rating	Result
Aiden Griffiths	1330	1 - 0
Steve Crees	1726	½ - ½
Antonia (Toni) T Reed	1564	1 - 0
Mark Riley	1724	1 - 0
T Giles Stanton	1541	½ - ½
Aiden Griffiths	1330	1 - 0
Steve Crees	1726	1 - 0
Antonia (Toni) T Reed	1564	0 - 1
Mark Riley	1724	1 - 0
T Giles Stanton	1541	1 - 0

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

1817 = (15770 + 400 * (7 - 1)) / 10)