Event: The Chess Centre - Horsforth (Class 1) Junior League

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Opponent Rating Result
Rohan Kirby 947 0 - 1
Zachary Hardman 738 1 - 0
Zachary Coggill 793 0 - 1
Ed Wakeling 1037 0 - 1
Magnus Grange 567 1 - 0
Rohan Kirby 799 0 - 1
Ed Wakeling 1077 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

680 = (5958 + 400 * (2 - 5)) / 7)

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