Event: Summer (Championship)

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Opponent	Rating	Result
Xavier Cowan	1861	1 - 0
Alastair G Johnstone	1572	0 - 1
Leslie Pringle	1630	1 - 0
Trevor Bates	1551	1 - 0
Anthony Braine	1666	1 - 0
Salvatore Cacciola	1569	1 - 0

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

1908 = (9849 + 400 * (5 - 1)) / 6)