Event: Division 2

Opponent Rating Result
Shane Cooksey 1495 1 - 0
Anthony R Meakin 1585 ½ - ½
Peter M Collins 1735 ½ - ½
Shriya Pillay 1503 0 - 1
David W Fone 1578 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1579 = (7896 + 400 * (1 - 1)) / 5)

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