Event: Division B

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Opponent Rating Result
Pritpal S Thethi 1819 ½ - ½
Mark R A Murrell 1857 1 - 0
Stephen Middleton 1908 ½ - ½
Peter Jaszkiwskyj 1956 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1985 = (7540 + 400 * (1 - 0)) / 4)

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