Event: Division 1

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Opponent Rating Result
Ernest Ignatovic 1902 1 - 0
Petr Vachtfeidl 1946 ½ - ½
John M Quinn 2167 0 - 1
Tony D Wells 2093 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1927 = (8108 + 400 * (1 - 2)) / 4)

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