www.farfarfar.com has some good (though not error-free) information regarding line4. It also has a reasonably good program you can practice against, and most importantly, a number of links to other sites related to line4.
(hjem) Hvis du er interessert i utviklingen av en turnering du spiller i kan du diskutere med dine motspillere i denne turneringens forum. (HelenaTanein) (Vis alle tips)