Event: Division 2

Opponent Rating Result
Derek J Reynolds 1499 ½ - ½
James Harrison 1521 ½ - ½
John A Figgins 1637 ½ - ½
Michael Smith 1308 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1591 = (5965 + 400 * (1 - 0)) / 4)

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