Event: North Norfolk Rapidplay (25|10)

Opponent Rating Result
Michael J Gibbons 1837 0 - 1
Michael J Gibbons 1837 ½ - ½
Edward Hackford 1536 1 - 0
Edward Hackford 1536 1 - 0
Peter WL Clough 1646 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1838 = (8392 + 400 * (3 - 1)) / 5)

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