Event: Derby & District Division 2

Opponent Rating Result
Joseph E Bradey 1940 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1940 = (1940 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Alex Abdullahi 1580 ½ - ½
David Matthews 1144 1 - 0
Vaughan WG Smith 1571 0 - 1
Anushka M. Ramawickrama 1689 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1496 = (5984 + 400 * (1 - 1)) / 4)