Event: Division 2

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Opponent Rating Result
Harry Myring 1826 0 - 1
Chris John Evans 1846 0 - 1
Roland Robson 1456 1 - 0
Warren Archibald 1581 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1577 = (6709 + 400 * (1 - 2)) / 4)

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