Event: Division 1

Opponent Rating Result
David Mathieson 1551 0 - 1
Michael Oszczyk 1783 0 - 1
Yin Chu 1551 ½ - ½
Tony Byrne 1518 1 - 0
Trevor Pitchford 0 0 - 1
Mahin Rughani 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

867 = (6403 + 400 * (1 - 4)) / 6)

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