Event: North Norfolk Championship (85|10)

Opponent Rating Result
David L Jones 1497 0 - 1
Adam Blackbourn 1624 0 - 1
Alan F Page 1725 0 - 1
David P Jones 1348 1 - 0
Chris Perkins 1781 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1355 = (7975 + 400 * (1 - 4)) / 5)

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