Event: A Division

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Opponent Rating Result
Lee P Kay 2014 0 - 1
Gareth NR Griffiths 1778 1 - 0
Lorand Sakic 1948 ½ - ½
Dave Toole 1901 ½ - ½
John S Reed 1888 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1906 = (9529 + 400 * (1 - 1)) / 5)

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