Event: Norfolk County Chess Championships

Opponent Rating Result
Antony C Hall 1855 1 - 0
Andrew D Hartland 1870 ½ - ½
John Anderson 2199 0 - 1
David E Hall 1929 1 - 0
Paul P Smith 1997 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2130 = (9850 + 400 * (3 - 1)) / 5)

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