Event: Winter Online

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Opponent Rating Result
Joel Hutchinson 1865 0 - 1
Joel Hutchinson 1865 0 - 1
Shahedul Alam 1345 ½ - ½
Shahedul Alam 1345 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1505 = (6420 + 400 * (1 - 2)) / 4)

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