Event: 23 / 24 Club Championship

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Opponent	Rating	Result
Jonathan Rooney	1653	1 - 0
Ian B Chester	1737	0 - 1
Robert Heyman	1573	0 - 1
Andrew Brown	1368	1 - 0
Alex K Blake	1824	0 - 1
Thomas Beckwith	1634	0 - 1
Martin Thompson	1384	0 - 1

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

1425 = (11173 + 400 * (2 - 5)) / 7)