Event: Reading-Chess-Challengers

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Opponent Rating Result
Yawar I Jafri 1611 1 - 0
Ilan G Dwek 1713 1 - 0
Stuart W Knox 1902 0 - 1
David Johnson 1715 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1935 = (6941 + 400 * (3 - 1)) / 4)

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