Event: North Norfolk Rapidplay (25|10)

Opponent Rating Result
David P Jones 1342 0 - 1
Tony R Larner 1509 1 - 0
Tony R Larner 1466 0 - 1
Alan F Page 1759 0 - 1
Richie Allen 1313 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1238 = (7389 + 400 * (1 - 4)) / 5)

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