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Event: Sheffield Chess Centre Open

Opponent Rating Result
Tomas Tomko 1850 1 - 0
Ewan Kershaw 1912 1 - 0
Andrew J Ledger 2431 ½ - ½
Thomas Wills 1911 0 - 1
David Wells 1848 1 - 0
Jonathan P Nelson 2074 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2138 = (12026 + 400 * (3 - 1)) / 6)

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