Event: Thornaby Junior Chess Open Under 18

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Opponent	Rating	Result
Charlie Miller	0	1 - 0
Josh Fisher	1260	0 - 1
Zac Gillott	0	1 - 0
Sam Stevenson	1209	0 - 1
Raihan Malik	0	0 - 1

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

414 = (2469 + 400 * (2 - 3)) / 5)