Event: Division 4

Opponent Rating Result
David Carpenter 1664 1 - 0
Peter J Horlock 1702 1 - 0
David Charters 1590 1 - 0
Iain Reeve 1692 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1862 = (6648 + 400 * (3 - 1)) / 4)

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