Event: Winter Rapid

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Opponent Rating Result
Steve Whatmore 1728 0 - 1
Aryan Shankar 1224 1 - 0
Stephen Gaskell 1826 0 - 1
Peter Turner 1333 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1328 = (6111 + 400 * (1 - 3)) / 4)

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