Event: Doncaster League

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Opponent Rating Result
Farrell P Clifford 1713 0 - 1
Ken Hunter 1752 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1333 = (3465 + 400 * (0 - 2)) / 2)

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Opponent Rating Result
Richard F Hall 1775 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1375 = (1775 + 400 * (0 - 1)) / 1)