Event: Worcester City Club Championship (Standardplay)

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

1582 = (4745 + 400 * (1 - 1)) / 3)

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