Event: Derby & District Division 3

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Opponent Rating Result
Garry Sands 1542 1 - 0
George Moorcroft 1351 1 - 0
Brian Lever 1536 ½ - ½
Piotr Natoniewski 1477 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1677 = (5906 + 400 * (2 - 0)) / 4)

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