Event: Two East

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Opponent Rating Result
Jason M Rihel 2001 ½ - ½
John S Walton 1833 1 - 0
Sammy Mendel 1810 ½ - ½
Istvan Karacsony 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1411 = (5644 + 400 * (1 - 1)) / 4)

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