Event: Open County Championship

Opponent Rating Result
Oliver J Lenton 1981 1 - 0
Mervyn J Hughes 1938 0 - 1
Mahmoud Dairi 0 1 - 0
Paul McMahon 1920 0 - 1
Mark Lim 1934 0 - 1
Okwose Marc Obi 1938 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1485 = (9711 + 400 * (2 - 4)) / 6)

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