Event: Division 4

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Opponent Rating Result
Arnaud Malet 0 0 - 1
Igor Naumov 1804 ½ - ½
Mark Croasdale 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

601 = (1804 + 400 * (1 - 1)) / 3)

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