Event: Division A

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Opponent Rating Result
Graham J Ashcroft 1953 1 - 0
Yousaf Ahmed 1428 1 - 0
Geoffrey Pennington 1779 ½ - ½
Robert Grounds 1173 1 - 0
John Whitfield 1800 ½ - ½
John H Schofield 1855 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1931 = (9988 + 400 * (4 - 0)) / 6)

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