Event: Division 2

Opponent Rating Result
James Turner 1938 1 - 0
John Liddle 1821 1 - 0
John S Clarke 1792 ½ - ½
Brian Towers 1896 0 - 1
Stefan Hartmann 1875 ½ - ½
Stefan Hartmann 2005 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1955 = (11327 + 400 * (2 - 1)) / 6)

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