Event: Thornaby Junior Chess Open Under 11

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Opponent	Rating	Result
Shadrach Moukoko	0	1 - 0
Marco Balocco	678	1 - 0
Dara Jafari	813	1 - 0
Sebastian Green	0	1 - 0
Freya Hind	843	1 - 0

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

867 = (2334 + 400 * (5 - 0)) / 5)