Event: Rapid Play

Opponent Rating Result
Paul A Chaplin 1345 0 - 1
Paul A Chaplin 1345 0 - 1
Gavin Johnstone 1315 0 - 1
Gavin Johnstone 1315 0 - 1
George Charlton 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

664 = (5320 + 400 * (0 - 5)) / 5)

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