Event: A&B Division

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Opponent Rating Result
Richard J Harris 1780 ½ - ½
Ammar Alghasra 1350 0 - 1
Stephen Rodgers 1645 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1592 = (4775 + 400 * (1 - 1)) / 3)

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Opponent Rating Result
Paul Frank 1596 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1196 = (1596 + 400 * (0 - 1)) / 1)