Event: Division 2

Opponent Rating Result
Bertrand A Barlow 1876 0 - 1
George Horan 1970 0 - 1
Keith S Jones 1749 ½ - ½
Martin G Smith 1890 0 - 1
Jonathan P Marrow 1867 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1630 = (9352 + 400 * (0 - 3)) / 5)

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