Event: Stowmarket Club Championships

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Opponent Rating Result
Ray Firman 0 0 - 1
Richard Caves 1050 0 - 1
Derek Chamberlain 0 0 - 1
James Irwin 0 0 - 1
Stephen Lewis 1800 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

170 = (2850 + 400 * (0 - 5)) / 5)

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