Event: Lawrance Cup

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Opponent Rating Result
Roman Ismailov 2107 ½ - ½
Roman Ismailov 2107 0 - 1
Peter W Rose 1818 1 - 0
Peter W Rose 1818 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2063 = (7850 + 400 * (2 - 1)) / 4)

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