Event: Open County Championship

Opponent Rating Result
Adrian G Elwin 1996 1 - 0
Robert R Sanders 2010 0 - 1
Szymon C Palucha 2154 0 - 1
Adrian MS Matthews 1830 0 - 1
Piotr Wasilak 0 ½ - ½
Oliver J Lenton 1981 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1595 = (9971 + 400 * (2 - 3)) / 6)

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