Event: Norfolk County Chess Championships

Opponent Rating Result
Benjamin PQ Collinson 1972 0 - 1
James Pack 1868 1 - 0
Chris Perkins 1774 ½ - ½
Antony C Hall 1930 ½ - ½
Michael J Gibbons 1852 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1879 = (9396 + 400 * (1 - 1)) / 5)

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