Event: Division Four

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Opponent Rating Result
Doruk Unver 1751 0 - 1
Mark E Tallis 1620 0 - 1
Eric Horwill 1585 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1519 = (4956 + 400 * (1 - 2)) / 3)

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