Event: League Division 1

Opponent Rating Result
Anthony Ibbitson 1754 1 - 0
John Hall 1959 1 - 0
Peter JE Ackley 2030 0 - 1
Oliver Gill 2239 0 - 1
Mark W Rogerson 2061 0 - 1
Roger W Jennings 1901 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1857 = (11944 + 400 * (2 - 4)) / 6)

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