Event: Reading-Chess-Challengers

Opponent Rating Result
Hussien Mohamed 0 0 - 1
Yawar I Jafri 1631 1 - 0
David Johnson 1728 ½ - ½
Seth Warren 1697 0 - 1
Stuart W Knox 1910 ½ - ½
David V Deane 1775 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1457 = (8741 + 400 * (2 - 2)) / 6)

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