Event: A Division

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Opponent Rating Result
Yang-Fan Zhou 2436 0 - 1
Keith C Arkell 2478 ½ - ½
Tetsuaki Sanada 2035 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2183 = (6949 + 400 * (0 - 1)) / 3)

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