Event: Division 4

Opponent Rating Result
Neil Benson 1578 ½ - ½
Victor B Rumsey 1798 ½ - ½
Vladimir Shmarov 1668 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1548 = (5044 + 400 * (0 - 1)) / 3)

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