Event: Winter Rapid

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Opponent Rating Result
John Staniforth 1740 0 - 1
Stephen Gaskell 1826 0 - 1
Stefan Winman 1291 0 - 1
Luke Fisher 1310 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1342 = (6167 + 400 * (1 - 3)) / 4)

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