Event: Worcestershire Championship League

Opponent Rating Result
Nigel S Towers 1807 ½ - ½
David Spowart 1771 0 - 1
Geoffrey M Herbert 1838 0 - 1
Peter W Lawrence 1657 ½ - ½
John F Varilone 1619 ½ - ½
Rob Sutton 1687 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1663 = (10379 + 400 * (1 - 2)) / 6)

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