Event: Division 2

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Opponent Rating Result
Oliver Ferris 1740 ½ - ½
Guillermo Beneyto 2000 0 - 1
Armando Galletti 1713 ½ - ½
Robert W Stephens 1735 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (7188 + 400 * (0 - 2)) / 4)

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