Event: Division 2

Opponent Rating Result
Geoffrey C Rosser 1630 ½ - ½
David Hulme 1840 ½ - ½
Lukasz Marcin Walijewski 1743 ½ - ½
Manpreet Sangha 2005 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1905 = (7218 + 400 * (1 - 0)) / 4)

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