Event: Division 2

Opponent Rating Result
Yuriy Slobodyuk 1726 1 - 0
Mike A Biddle 1748 ½ - ½
David Hulme 1864 ½ - ½
George McCumiskey 764 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1726 = (6102 + 400 * (2 - 0)) / 4)

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