Event: Division 1

Opponent Rating Result
William Murphy 1539 1 - 0
Christopher Willoughby 1731 0 - 1
Mustapha Rahaman 1667 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1646 = (4937 + 400 * (1 - 1)) / 3)

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