Event: Worcestershire Challengers' League

Opponent Rating Result
Gavin Cartwright 1846 1 - 0
Brian Turner 1972 0 - 1
Marcus Walsh 1938 ½ - ½
Scott Russell 1769 0 - 1
Paul B Sharratt 1729 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1851 = (9254 + 400 * (2 - 2)) / 5)

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