Event: u1850 County Championship

Opponent Rating Result
Antony C Hall 1849 ½ - ½
Andrew J Donnelly 1834 1 - 0
Neil Greenwood 1825 ½ - ½
Antony C Hall 1849 0 - 1
James Pack 1818 1 - 0
Paul Spencer 1748 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1887 = (10923 + 400 * (2 - 1)) / 6)

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