Event: YJCA Grand Prix Event 1 Intermediate Section

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Opponent	Rating	Result
Raphael Shan	0	0 - 1
James Parfitt	0	0 - 1
Ivan Shi	0	0 - 1
Freya Bramall	0	0 - 1
Parin Mangal	0	0 - 1

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

-400 = (0 + 400 * (0 - 5)) / 5)