Event: Worcestershire Challengers' League

Opponent Rating Result
David Smith 1801 ½ - ½
Paul Thomas 1353 ½ - ½
Paul B Sharratt 1794 1 - 0
Paul Furniss 1645 ½ - ½
Julie C Wilson 1800 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1759 = (8393 + 400 * (1 - 0)) / 5)

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