Event: Christmas Rapidplay

Opponent Rating Result
Francis Batchelor 1927 0 - 1
Freya Hind 853 1 - 0
Sachin Saggar 1541 1 - 0
J Alan Stockley 1381 1 - 0
Joseph Machin 1469 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1674 = (7171 + 400 * (4 - 1)) / 5)

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