Event: Division 4

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Opponent Rating Result
Jonathan Welton 1667 ½ - ½
Mark J Fulleylove 1699 1 - 0
David Charters 1590 1 - 0
Pavlo Perevarukha 1420 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1894 = (6376 + 400 * (3 - 0)) / 4)

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