Event: Derby & District Division 2

Opponent Rating Result
Owen Dale 1629 ½ - ½
Nigel D Marshall 1448 1 - 0
John E Fryer 1497 1 - 0
David J Pickering 1737 1 - 0
George Gledhill 1526 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1807 = (7837 + 400 * (3 - 0)) / 5)

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