Event: Division 2

Opponent Rating Result
Ayman Hammam 2099 ½ - ½
Shanjit Trishad 1596 1 - 0
Paul D Yerbury 1842 ½ - ½
Tony B Packham 1745 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1921 = (7282 + 400 * (1 - 0)) / 4)

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