Event: 400 Max

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Opponent	Rating	Result
Amit Senthil-Kumar	60	1 - 0
Doug Cooper	73	0 - 1
Chris Williamson	92	0 - 1
Richard F Collett	84	1 - 0
Amit Senthil-Kumar	60	1 - 0
Goran Stepanovic	77	1 - 0
Chris Williamson	92	0 - 1
Richard F Collett	84	0 - 1

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

78 = (622 + 400 * (4 - 4)) / 8)