Event: Thornaby Junior Chess Open Under 18

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Opponent	Rating	Result
Ben Armstrong	0	1 - 0
Stanley Allan	987	1 - 0
Zhuoyi Lin	1140	1 - 0
Steven Clark	1383	1 - 0
Sam Stevenson	1209	0 - 1

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

1184 = (4719 + 400 * (4 - 1)) / 5)