Event: Norfolk Team Blitz-Championship

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Opponent	Rating	Result
Paul P Smith	2081	0 - 1
Hazel Bowler	1929	0 - 1
Antony C Hall	1694	0 - 1
Jeff R Dawson	1893	0 - 1
Jaden Jermy	2101	0 - 1
Martin G Walker	2167	0 - 1
William Bradley	1507	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1625 = (13372 + 400 * (1 - 6)) / 7)