Event: Internal Rapidplay February

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Opponent Rating Result
George Butterworth 1015 1 - 0
Karam Alwakeel 1013 1 - 0
J Alan Stockley 1380 0 - 1
William Rowett 1218 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1357 = (4626 + 400 * (3 - 1)) / 4)

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