Event: Worcestershire Challengers' League

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Opponent	Rating	Result
Matthew Jordan	1745	½ - ½
Robert Davies	1715	0 - 1
T Giles Stanton	1585	½ - ½
Joshua Clarke	1788	0 - 1
Steve Crees	1692	0 - 1
Chris Lee	0	0 - 1
Scott Oxtoby	1493	½ - ½
Julie C Wilson	1800	0 - 1
Christopher J Evans	1732	0 - 1
Antonia (Toni) T Reed	1569	0 - 1

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

1232 = (15119 + 400 * (0 - 7)) / 10)