Event: Division 1

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Opponent Rating Result
Neil R McDonald 2478 0 - 1
Allen Chi Zhou Fan 2147 ½ - ½
Stephen C Ledger 2145 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2123 = (6770 + 400 * (0 - 1)) / 3)

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