Event: Worcester City Club Championship (Standardplay)

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Opponent Rating Result
Aiden Griffiths 1408 ½ - ½
Joe Rastall 1929 Adjourned
Aiden Griffiths 1408 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1608 = (2816 + 400 * (1 - 0)) / 2)

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