Event: Internal Rapidplay January

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Opponent Rating Result
Francis Batchelor 1921 0 - 1
Harris Wilson 1131 0 - 1
George Butterworth 922 1 - 0
Bhima Patil 1320 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1324 = (5294 + 400 * (2 - 2)) / 4)

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