Event: Worcestershire Championship League

Opponent Rating Result
Joe Rastall 1831 ½ - ½
Ian J Clarke 1978 ½ - ½
Peter S Banks 1605 ½ - ½
Alex Eaton 1731 1 - 0
Tony Shaw 1749 1 - 0
Mike Hadley 1861 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1859 = (10755 + 400 * (2 - 1)) / 6)

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