Event: NCCA League Division 3

Opponent Rating Result
Henry Leather 1756 ½ - ½
John R Wickham 1634 0 - 1
Brian J Cunningham 1607 ½ - ½
Carl Purkiss 1593 1 - 0
Alistair Patrick 1550 1 - 0
Graham R Jones 1536 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1679 = (9676 + 400 * (2 - 1)) / 6)

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