Event: Division B

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Opponent Rating Result
Robin J Oakley 1729 0 - 1
Stephen Banks 1406 ½ - ½
Jiayi Zheng 1109 1 - 0
Kenneth Jardine 1521 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1341 = (5765 + 400 * (1 - 2)) / 4)

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