Event: Worcestershire Challengers' League

Opponent Rating Result
Stephen V Woodhouse 1847 1 - 0
Joe Rastall 1831 0 - 1
Matthew Jordan 1761 ½ - ½
Scott Russell 1769 1 - 0
John Chester 1709 ½ - ½
Mark Bethel 1810 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1788 = (10727 + 400 * (2 - 2)) / 6)

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