Event: Division 3

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Opponent Rating Result
Terry Robinson 1516 1 - 0
Richard Myhill 1475 ½ - ½
Adam Sutton 1300 1 - 0
Michael MJ Osborn 1573 ½ - ½
Sergejs Starodubcevs 1621 0 - 1
James A Briginshaw 1815 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1550 = (9300 + 400 * (2 - 2)) / 6)

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