Event: Summer (Championship)

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Opponent	Rating	Result
Leslie Pringle	1630	1 - 0
Trevor Bates	1551	1 - 0
Salvatore Cacciola	1569	1 - 0
Xavier Cowan	1861	0 - 1
Matthew Georgiou	1776	0 - 1
Alastair G Johnstone	1572	1 - 0

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

1793 = (9959 + 400 * (4 - 2)) / 6)