Event: Norfolk Team Blitz-Championship

Opponent Rating Result
Martin G Walker 2167 0 - 1
David J Twitchell 1877 1 - 0
Paul P Smith 2081 0 - 1
Yuming Bian 1333 1 - 0
Antony C Hall 1694 0 - 1
John R Wickham 1743 1 - 0
Jaden Jermy 2101 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1799 = (12996 + 400 * (3 - 4)) / 7)

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