Event: Club Challengers

Opponent Rating Result
Mervyn J Hughes 1855 0 - 1
Andrew D Hartland 1825 1 - 0
Yosif A Antonov 1618
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1840 = (3680 + 400 * (1 - 1)) / 2)

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