Event: Division 2

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Opponent Rating Result
Meet Shah 1868 1 - 0
B Peter A Andrews 2011 ½ - ½
Petr Vachtfeidl 1917 0 - 1
David A Varley 1783 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1895 = (7579 + 400 * (1 - 1)) / 4)

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