Event: Central London Qualifier

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Opponent	Rating	Result
Jerry Z Zheng	1848	0 - 1
Anton Poluneev	0	1 - 0
Uri Erez	1382	0 - 1

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

943 = (3230 + 400 * (1 - 2)) / 3)